#include <string>
#include <vector>
#include <iostream>
#include <cstdio>
#include <cstdlib>
using namespace std;

class GridSortMax {
  public:
    string findMax(int n, int m, vector <int> grid);
};

string GridSortMax::findMax(int n, int m, vector <int> G)
{
  return "";
}