#include <vector>
#include <queue>
using namespace std;

class Solution {
public:
    int deleteGreatestValue(vector<vector<int>>& grid) {
        int m = grid.size(), n = grid[0].size();
        for (int i = 0; i < m; i++) {
            sort(grid[i].begin(), grid[i].end());
        }
        int res = 0;
        for (int j = 0; j < n; j++) {
            int mx = 0;
            for (int i = 0; i < m; i++) {
                mx = max(mx, grid[i][j]);
            }
            res += mx;
        }
        return res;
    }
};