Leetcode problem 117 - Count Negative Numbers in a Sorted Matrix
Given a m x n matrix grid which is sorted in non-increasing order both row-wise and column-wise, return the number of negative numbers in grid.
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Leetcode problem 116 - Delete Greatest Value in Each Row
You are given an m x n matrix grid consisting of positive integers.
Leetcode problem 115 - Matrix Diagonal Sum
Given a square matrix mat, return the sum of the matrix diagonals.
Leetcode problem 114 - Largest Local Values in a Matrix
You are given an n x n integer matrix grid.
Leetcode problem 113 - Richest Customer Wealth
You are given an m x n integer grid accounts where accounts[i][j] is the amount of money the ith customer has in the jth bank. ...