Contest 176 - LeetCode 1351. Count Negative Numbers in a Sorted Matrix

​​题目​​

class Solution {
public:
    int countNegatives(vector<vector<int>>& grid) {
        
        int ans=0;
        for(int i=0;i<grid.size();i++)
        {
            for(int j=grid[i].size()-1;j>=0;j--)
            {
                if(grid[i][j]<0)
                    ans++;
                else
                    break;
            }
        }
        return ans;
        
    }
};