LC 0268 [E] Missing Number - ALawliet/algorithms GitHub Wiki
class Solution:
def missingNumber(self, nums: List[int]) -> int:
i = 0
n = len(nums)
while i < n:
j = nums[i]
if nums[i] < n and nums[i] != nums[j]:
nums[i], nums[j] = nums[j], nums[i]
else:
i += 1
for i in range(n):
if nums[i] != i:
return i
return n