Page Index - cocoder39/coco39_LC GitHub Wiki

1155 page(s) in this GitHub Wiki:

• Home
• 1. Two Sum
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• 10. Regular Expression Matching
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• 100. Same Tree
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• 1004. Max Consecutive Ones III
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• 101. Symmetric Tree
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• 102. Binary Tree Level Order Traversal
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• 1024. Video Stitching
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• 103. Binary Tree Zigzag Level Order Traversal
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• 104. Maximum Depth of Binary Tree
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• 1041. Robot Bounded In Circle
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• 1042. Flower Planting With No Adjacent
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• 1047. Remove All Adjacent Duplicates In String
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• 1048. Longest String Chain
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• 105. Construct Binary Tree from Preorder and Inorder Traversal
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• 1058. Minimize Rounding Error to Meet Target
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• 106. Construct Binary Tree from Inorder and Postorder Traversal
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• 1060. Missing Element in Sorted Array
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• 107. Binary Tree Level Order Traversal II
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• 108. Convert Sorted Array to Binary Search Tree
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• 109. Convert Sorted List to Binary Search Tree
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• 1091. Shortest Path in Binary Matrix
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• 1094. Car Pooling
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• 11. Container With Most Water
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• 110. Balanced Binary Tree
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• 1109. Corporate Flight Bookings
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• 111. Minimum Depth of Binary Tree
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• 1110. Delete Nodes And Return Forest
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• 1114. Print in Order
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• 1115. Print FooBar Alternately
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• 1116. Print Zero Even Odd
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• 1117. Building H2O
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• 112. Path Sum
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• 113. Path Sum II
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• 1130. Minimum Cost Tree From Leaf Values
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• 114. Flatten Binary Tree to Linked List
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• 1140. Stone Game II
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• 1143. Longest Common Subsequence
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• 1146. Snapshot Array
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• 115. Distinct Subsequences
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• 1153. String Transforms Into Another String
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• 116. Populating Next Right Pointers in Each Node
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• 1162. As Far from Land as Possible
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• 1166. Design File System
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• 117. Populating Next Right Pointers in Each Node II
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• 1188. Design Bounded Blocking Queue
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• 1192. Critical Connections in a Network
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• 1195. Fizz Buzz Multithreaded
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• 1197. Minimum Knight Moves
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• 120. Triangle
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• 1202. Smallest String With Swaps
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• 1206. Design Skiplist
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• 1209. Remove All Adjacent Duplicates in String II
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• 121. Best Time to Buy and Sell Stock
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• 1216. Valid Palindrome III
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• 122. Best Time to Buy and Sell Stock II
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• 1226. The Dining Philosophers
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• 1229. Meeting Scheduler
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• 123. Best Time to Buy and Sell Stock III
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• 1235. Maximum Profit in Job Scheduling
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• 124. Binary Tree Maximum Path Sum
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• 1242. Web Crawler Multithreaded
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• 1249. Minimum Remove to Make Valid Parentheses
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• 1257. Smallest Common Region
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• 126. Word Ladder II
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• 1268. Search Suggestions System
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• 127. Word Ladder
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• 1279. Traffic Light Controlled Intersection
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• 128. Longest Consecutive Sequence
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• 129. Sum Root to Leaf Numbers
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• 13. Roman to Integer
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• 130. Surrounded Regions
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• 131. Palindrome Partitioning
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• 1314. Matrix Block Sum
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• 132. Palindrome Partitioning II
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• 1326. Minimum Number of Taps to Open to Water a Garden
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• 133. Clone Graph
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• 1334. Find the City With the Smallest Number of Neighbors at a Threshold Distance
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• 134. Gas Station
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• 1352. Product of the Last K Numbers
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• 1359. Count All Valid Pickup and Delivery Options
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• 1361. Validate Binary Tree Nodes
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• 138. Copy List with Random Pointer
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• 1382. Balance a Binary Search Tree
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• 1386. Cinema Seat Allocation
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• 139. Word Break
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• 14. Longest Common Prefix
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• 140. Word Break II
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• 1404. Number of Steps to Reduce a Number in Binary Representation to One
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• 1405. Longest Happy String
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• 141. Linked List Cycle
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• 142. Linked List Cycle II
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• 1423. Maximum Points You Can Obtain from Cards
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• 1424. Diagonal Traverse II
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• 1428. Leftmost Column with at Least a One
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• 143. Reorder List
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• 144. Binary Tree Preorder Traversal
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• 1443. Minimum Time to Collect All Apples in a Tree
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• 145. Binary Tree Postorder Traversal
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• 146. LRU Cache
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• 147. Insertion Sort List
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• 1472. Design Browser History
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• 148. Sort List
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• 149. Max Points on a Line
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• 15. 3Sum
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• 151. Reverse Words in a String
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• 1514. Path with Maximum Probability
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• 152. Maximum Product Subarray
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• 1522. Diameter of N‐Ary Tree
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• 153. Find Minimum in Rotated Sorted Array
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• 1539. Kth Missing Positive Number
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• 154. Find Minimum in Rotated Sorted Array II
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• 155. Min Stack
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• 156. Binary Tree Upside Down
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• 157. Read N Characters Given Read4
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• 1570. Dot Product of Two Sparse Vectors
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• 158. Read N Characters Given Read4 II Call multiple times
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• 16. 3Sum Closest
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• 160. Intersection of Two Linked Lists
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• 1604. Alert Using Same Key Card Three or More Times in a One Hour Period
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• 161. One Edit Distance
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• 162. Find Peak Element
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• 1626. Best Team With No Conflicts
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• 163. Missing Ranges
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• 1631. Path With Minimum Effort
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• 164. Maximum Gap
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• 1643. Kth Smallest Instructions
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• 1644. Lowest Common Ancestor of a Binary Tree II
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• 1650. Lowest Common Ancestor of a Binary Tree III
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• 1665. Minimum Initial Energy to Finish Tasks
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• 1674. Minimum Moves to Make Array Complementary
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• 1675. Minimize Deviation in Array
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• 168. Excel Sheet Column Title
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• 1680. Concatenation of Consecutive Binary Numbers
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• 1686. Stone Game VI
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• 1690. Stone Game VII
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• 17. Letter Combinations of a Phone Number
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• 171. Excel Sheet Column Number
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• 1712. Ways to Split Array Into Three Subarrays
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• 1722. Minimize Hamming Distance After Swap Operations
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• 1723. Find Minimum Time to Finish All Jobs
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• 1727. Largest Submatrix With Rearrangements
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• 173. Binary Search Tree Iterator
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• 174. Dungeon Game
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• 1755. Closest Subsequence Sum
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• 1760. Minimum Limit of Balls in a Bag
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• 1762. Buildings With an Ocean View
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• 1775. Equal Sum Arrays With Minimum Number of Operations
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• 1787. Make the XOR of All Segments Equal to Zero
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• 179. Largest Number
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• 1801. Number of Orders in the Backlog
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• 1802. Maximum Value at a Given Index in a Bounded Array
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• 1803. Count Pairs With XOR in a Range
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• 1806. Minimum Number of Operations to Reinitialize a Permutation
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• 1808. Maximize Number of Nice Divisors
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• 1825. Finding MK Average
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• 1838. Frequency of the Most Frequent Element
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• 1839. Longest Substring Of All Vowels in Order
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• 1840. Maximum Building Height
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• 1850. Minimum Adjacent Swaps to Reach the Kth Smallest Number
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• 1856. Maximum Subarray Min Product
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• 186. Reverse Words in a String II
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• 1866. Number of Ways to Rearrange Sticks With K Sticks Visible
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• 1868. Product of Two Run‐Length Encoded Arrays
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• 1871. Jump Game VII
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• 188. Best Time to Buy and Sell Stock IV
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• 1882. Process Tasks Using Servers
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• 1888. Minimum Number of Flips to Make the Binary String Alternating
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• 189. Rotate Array
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• 1891. Cutting Ribbons
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• 19. Remove Nth Node From End of List
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• 1905. Count Sub Islands
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• 191. Number of 1 Bits
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• 1915. Number of Wonderful Substrings
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• 1931. Painting a Grid With Three Different Colors
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• 1937. Maximum Number of Points with Cost
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• 198. House Robber
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• 199. Binary Tree Right Side View
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• 2. Add Two Numbers
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• 20. Valid Parentheses
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• 200. Number of Islands
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• 201. Bitwise AND of Numbers Range
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• 202. Happy Number
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• 203. Remove Linked List Elements
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• 204. Count Primes
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• 205. Isomorphic Strings
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• 206. Reverse Linked List
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• 2060. Check if an Original String Exists Given Two Encoded Strings
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• 207. Course Schedule
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• 208. Implement Trie (Prefix Tree)
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• 209. Minimum Size Subarray Sum
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• 21. Merge Two Sorted Lists
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• 210. Course Schedule II
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• 211. Add and Search Word Data structure design
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• 212. Word Search II
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• 213. House Robber II
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• 2133. Check if Every Row and Column Contains All Numbers
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• 214. Shortest Palindrome
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• 215. Kth Largest Element in an Array
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• 216. Combination Sum III
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• 218. The Skyline Problem
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• 22. Generate Parentheses
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• 221. Maximal Square
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• 222. Count Complete Tree Nodes
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• 223. Rectangle Area
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• 224. Basic Calculator
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• 2246. Longest Path With Different Adjacent Characters
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• 225. Implement Stack using Queues
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• 226. Invert Binary Tree
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• 227. Basic Calculator II
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• 2275. Largest Combination With Bitwise AND Greater Than Zero
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• 2276. Count Integers in Intervals
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• 228. Summary Ranges
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• 23. Merge k Sorted Lists
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• 230. Kth Smallest Element in a BST
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• 232. Implement Queue using Stacks
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• 234. Palindrome Linked List
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• 235. Lowest Common Ancestor of a Binary Search Tree
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• 236. Lowest Common Ancestor of a Binary Tree
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• 237. Delete Node in a Linked List
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• 239. Sliding Window Maximum
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• 24. Swap Nodes in Pairs
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• 240. Search a 2D Matrix II
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• 241. Different Ways to Add Parentheses
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• 242. Valid Anagram
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• 243. Shortest Word Distance
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• 244. Shortest Word Distance II
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• 245. Shortest Word Distance III
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• 246. Strobogrammatic Number
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• 247. Strobogrammatic Number II
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• 248. Strobogrammatic Number III
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• 249. Group Shifted Strings
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• 25. Reverse Nodes in k Group
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• 250. Count Univalue Subtrees
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• 251. Flatten 2D Vector
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• 252. Meeting Rooms
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• 253. Meeting Rooms II
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• 254. Factor Combinations
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• 255. Verify Preorder Sequence in Binary Search Tree
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• 256. Paint House
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• 257. Binary Tree Paths
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• 26. Remove Duplicates from Sorted Array
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• 261. Graph Valid Tree
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• 263. Ugly Number
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• 264. Ugly Number II
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• 265. Paint House II
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• 266. Palindrome Permutation
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• 267. Palindrome Permutation II
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• 269. Alien Dictionary
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• 27. Remove Element
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• 270. Closest Binary Search Tree Value
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• 271. Encode and Decode Strings
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• 272. Closest Binary Search Tree Value II
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• 273. Integer to English Words
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• 274. H Index
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• 275. H Index II
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• 276. Paint Fence
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• 277. Find the Celebrity
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• 278. First Bad Version
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• 279. Perfect Squares
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• 28. Implement strStr()
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• 280. Wiggle Sort
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• 281. Zigzag Iterator
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• 282. Expression Add Operators
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• 283. Move Zeroes
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• 284. Peeking Iterator
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• 285. Inorder Successor in BST
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• 286. Walls and Gates
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• 287. Find the Duplicate Number
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• 288. Unique Word Abbreviation
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• 289. Game of Life
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• 29. Divide Two Integers
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• 293. Flip Game
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• 294. Flip Game II
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• 295. Find Median from Data Stream
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• 296. Best Meeting Point
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• 297. Serialize and Deserialize Binary Tree
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• 298. Binary Tree Longest Consecutive Sequence
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• 299. Bulls and Cows
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• 3. Longest Substring Without Repeating Characters
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• 30. Substring with Concatenation of All Words
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• 300. Longest Increasing Subsequence
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• 301. Remove Invalid Parentheses
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• 302. Smallest Rectangle Enclosing Black Pixels
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• 303. Range Sum Query Immutable
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• 304. Range Sum Query 2D Immutable
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• 305. Number of Islands II
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• 306. Additive Number
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• 307. Range Sum Query Mutable
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• 308. Range Sum Query 2D Mutable
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• 309. Best Time to Buy and Sell Stock with Cooldown
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• 31. Next Permutation
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• 310. Minimum Height Trees
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• 311. Sparse Matrix Multiplication
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• 312. Burst Balloons
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• 313. Super Ugly Number
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• 314. Binary Tree Vertical Order Traversal
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• 315. Count of Smaller Numbers After Self
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• 316. Remove Duplicate Letters
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• 317. Shortest Distance from All Buildings
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• 318. Maximum Product of Word Lengths
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• 32. Longest Valid Parentheses
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• 320. Generalized Abbreviation
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• 321. Create Maximum Number
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• 322. Coin Change
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• 323. Number of Connected Components in an Undirected Graph
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• 324. Wiggle Sort II
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• 325. Maximum Size Subarray Sum Equals k
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• 327. Count of Range Sum
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• 328. Odd Even Linked List
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• 329. Longest Increasing Path in a Matrix
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• 33. Search in Rotated Sorted Array
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• 330. Patching Array
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• 331. Verify Preorder Serialization of a Binary Tree
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• 332. Reconstruct Itinerary
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• 333. Largest BST Subtree
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• 334. Increasing Triplet Subsequence
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• 335. Self Crossing
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• 336. Palindrome Pairs
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• 337. House Robber III
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• 338. Counting Bits
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• 339. Nested List Weight Sum
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• 34. Search for a Range
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• 340. Longest Substring with At Most K Distinct Characters
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• 341. Flatten Nested List Iterator
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• 343. Integer Break
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• 344. Reverse String
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• 345. Reverse Vowels of a String
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• 346. Moving Average from Data Stream
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• 347. Top K Frequent Elements
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• 348. Design Tic Tac Toe
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• 349. Intersection of Two Arrays
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• 35. Search Insert Position
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• 350. Intersection of Two Arrays II
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• 351. Android Unlock Patterns
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• 352. Data Stream as Disjoint Intervals
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• 353. Design Snake Game
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• 354. Russian Doll Envelopes
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• 355. Design Twitter
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• 356. Line Reflection
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• 357. Count Numbers with Unique Digits
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• 358. Rearrange String k Distance Apart
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• 359. Logger Rate Limiter
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• 36. Valid Sudoku
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• 360. Sort Transformed Array
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• 361. Bomb Enemy
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• 362. Design Hit Counter
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• 363. Max Sum of Rectangle No Larger Than K
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• 364. Nested List Weight Sum II
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• 365. Water and Jug Problem
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• 366. Find Leaves of Binary Tree
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• 367. Valid Perfect Square
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• 368. Largest Divisible Subset
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• 369. Plus One Linked List
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• 37. Sudoku Solver
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• 370. Range Addition
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• 371. Sum of Two Integers
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• 372. Super Pow
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• 373. Find K Pairs with Smallest Sums
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• 374. Guess Number Higher or Lower
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• 375. Guess Number Higher or Lower II
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• 376. Wiggle Subsequence
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• 377. Combination Sum IV
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• 378. Kth Smallest Element in a Sorted Matrix
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• 38. Count and Say
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• 380. Insert Delete GetRandom O(1)
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• 381. Insert Delete GetRandom O(1) Duplicates allowed
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• 382. Linked List Random Node
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• 384. Shuffle an Array
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• 385. Mini Parser
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• 388. Longest Absolute File Path
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• 39. Combination Sum
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• 392. Is Subsequence
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• 394. Decode String
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• 395. Longest Substring with At Least K Repeating Characters
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• 398. Random Pick Index
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• 399. Evaluate Division
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• 4. Median of Two Sorted Arrays
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• 40. Combination Sum II
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• 404. Sum of Left Leaves
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• 408. Valid Word Abbreviation
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• 41. First Missing Positive
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• 410. Split Array Largest Sum
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• 413. Arithmetic Slices
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• 416. Partition Equal Subset Sum
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• 419. Battleships in a Board
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• 42. Trapping Rain Water
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• 423. Reconstruct Original Digits from English
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• 426. Convert Binary Search Tree to Sorted Doubly Linked List
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• 427. Construct Quad Tree
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• 428. Serialize and Deserialize N ary Tree
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• 43. Multiply Strings
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• 438. Find All Anagrams in a String
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• 44. Wildcard Matching
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• 449. Serialize and Deserialize BST
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• 45. Jump Game II
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• 450. Delete Node in a BST
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• 451. Sort Characters By Frequency
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• 46. Permutations
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• 460. LFU Cache
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• 465. Optimal Account Balancing
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• 468. Validate IP Address
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• 47. Permutations II
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• 470. Implement Rand10() Using Rand7()
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• 472. Concatenated Words
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• 473. Matchsticks to Square
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• 478. Generate Random Point in a Circle
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• 48. Rotate Image
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• 489. Robot Room Cleaner
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• 49. Group Anagrams
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• 490. The Maze
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• 493. Reverse Pairs
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• 494. Target Sum
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• 498. Diagonal Traverse
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• 499. The Maze III
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• 5. Longest Palindromic Substring
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• 50. Pow(x, n)
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• 505. The Maze II
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• 51. N Queens
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• 518. Coin Change 2
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• 52. N Queens II
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• 523. Continuous Subarray Sum
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• 528. Random Pick with Weight
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• 529. Minesweeper
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• 53. Maximum Subarray
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• 532. K diff Pairs in an Array
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• 536. Construct Binary Tree from String
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• 54. Spiral Matrix
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• 542. 01 Matrix
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• 543. Diameter of Binary Tree
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• 56. Merge Intervals
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• 560. Subarray Sum Equals K
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• 568. Maximum Vacation Days
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• 57. Insert Interval
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• 572. Subtree of Another Tree
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• 588. Design In Memory File System
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• 59. Spiral Matrix II
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• 60. Permutation Sequence
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• 609. Find Duplicate File in System
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• 61. Rotate List
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• 62. Unique Paths
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• 621. Task Scheduler
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• 63. Unique Paths II
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• 631. Design Excel Sum Formula
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• 636. Exclusive Time of Functions
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• 64. Minimum Path Sum
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• 642. Design Search Autocomplete System
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• 646. Maximum Length of Pair Chain
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• 65. Valid Number
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• 67. Add Binary
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• 670. Maximum Swap
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• 675. Cut Off Trees for Golf Event
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• 68. Text Justification
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• 680. Valid Palindrome II
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• 688. Knight Probability in Chessboard
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• 69. Sqrt(x)
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• 691. Stickers to Spell Word
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• 692. Top K Frequent Words
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• 694. Number of Distinct Islands
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• 698. Partition to K Equal Sum Subsets
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• 70. Climbing Stairs
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• 708. Insert into a Sorted Circular Linked List
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• 71. Simplify Path
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• 712. Minimum ASCII Delete Sum for Two Strings
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• 714. Best Time to Buy and Sell Stock with Transaction Fee
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• 718. Maximum Length of Repeated Subarray
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• 72. Edit Distance
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• 721. Accounts Merge
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• 73. Set Matrix Zeroes
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• 731. My Calendar II
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• 732. My Calendar III
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• 733. Flood Fill
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• 735. Asteroid Collision
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• 739. Daily Temperatures
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• 74. Search a 2D Matrix
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• 743. Network Delay Time
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• 75. Sort Colors
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• 750. Number Of Corner Rectangles
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• 751. IP to CIDR
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• 755. Pour Water
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• 759. Employee Free Time
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• 76. Minimum Window Substring
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• 766. Toeplitz Matrix
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• 767. Reorganize String
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• 77. Combinations
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• 772. Basic Calculator III
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• 777. Swap Adjacent in LR String
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• 78. Subsets
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• 785. Is Graph Bipartite?
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• 787. Cheapest Flights Within K Stops
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• 79. Word Search
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• 791. Custom Sort String
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• 797. All Paths From Source to Target
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• 8. String to Integer (atoi)
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• 81. Search in Rotated Sorted Array II
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• 815. Bus Routes
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• 82. Remove Duplicates from Sorted List II
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• 827. Making A Large Island
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• 829. Consecutive Numbers Sum
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• 83. Remove Duplicates from Sorted List
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• 839. Similar String Groups
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• 84. Largest Rectangle in Histogram
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• 843. Guess the Word
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• 847. Shortest Path Visiting All Nodes
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• 85. Maximal Rectangle
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• 854. K Similar Strings
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• 86. Partition List
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• 863. All Nodes Distance K in Binary Tree
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• 864. Shortest Path to Get All Keys
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• 87. Scramble String
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• 872. Leaf‐Similar Trees
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• 877. Stone Game
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• 88. Merge Sorted Array
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• 885. Spiral Matrix III
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• 886. Possible Bipartition
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• 895. Maximum Frequency Stack
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• 90. Subsets II
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• 907. Sum of Subarray Minimums
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• 91. Decode Ways
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• 917. Reverse Only Letters
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• 92. Reverse Linked List II
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• 921. Minimum Add to Make Parentheses Valid
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• 923. 3Sum With Multiplicity
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• 93. Restore IP Addresses
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• 938. Range Sum of BST
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• 94. Binary Tree Inorder Traversal
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• 945. Minimum Increment to Make Array Unique
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• 95. Unique Binary Search Trees II
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• 953. Verifying an Alien Dictionary
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• 958. Check Completeness of a Binary Tree
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• 959. Regions Cut By Slashes
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• 96. Unique Binary Search Trees
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• 97. Interleaving String
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• 973. K Closest Points to Origin
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• 98. Validate Binary Search Tree
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• 981. Time Based Key Value Store
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• 986. Interval List Intersections
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• 987. Vertical Order Traversal of a Binary Tree
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• 99. Recover Binary Search Tree
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• Array & string
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• BFS Shortest Path Template
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• Binary Index Tree
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• Binary search
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• Binary search (bug)
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• Bit wise
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• Bitwise operation
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• Concurrency
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• Cycle detection in directed graph
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• Data Structure: Binary Index Tree
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• Data Structure: Union Find
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• Design
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• DFS & BFS
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• Divide and Conquer
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• Dynamic programming
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• English
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• Find out repeated number in array
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• Graph
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• Greedy
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• Heuristic
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• Josephus problem (count out)
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• LC 319: Bulb Switcher
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• Line Sweep
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• Linked list
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• Logical and Maintainable
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• Math
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• merge sort
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• Preface
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• Python Notes
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• quick sort
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• Random and Sampling
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• Sort
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• Stack and Queue
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• Terms
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• tree
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• TreeMap
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• Trie
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• Two pointers
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• Union find
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