count_negative_in_2d.cpp

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