0598. Range Addition II

You are given an m x n matrix M initialized with all 0's and an array of operations ops, where ops[i] = [ai, bi] means M[x][y] should be incremented by one for all 0 <= x < ai and 0 <= y < bi.

Count and return the number of maximum integers in the matrix after performing all the operations.

Example 1:

Input: m = 3, n = 3, ops = [[2,2],[3,3]]

Output: 4

Explanation: The maximum integer in M is 2, and there are four of it in M. So return 4.

Example 2:

Input: m = 3, n = 3, ops = [[2,2],[3,3],[3,3],[3,3],[2,2],[3,3],[3,3],[3,3],[2,2],[3,3],[3,3],[3,3]]

Output: 4

Example 3:

Input: m = 3, n = 3, ops = []

Output: 9

Constraints:

• 1 <= m, n <= 4 * 10^4
• 1 <= ops.length <= 10^4
• ops[i].length == 2
• 1 <= ai <= m
• 1 <= bi <= n

class Solution {
    public int maxCount(int m, int n, int[][] ops) {
        int x = m, y = n;
        for(int[] arr : ops){
            x = Math.min(x, arr[0]);
            y = Math.min(y, arr[1]);
        }
        return x * y;
    }
}