func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n, m;     cin >> n >> m;     vector<vector<pair<int, string> > > rg(m, vector<pair<int, string> >(1));     for (int i = 0; i < n; i++) {       string sn;       int r, s;       cin >> sn;       scanf( %d %d , &r, &s);       rg[r - 1].push_back(make_pair(s, sn));     }     for (int i = 0; i < m; i++) {       rg[i][0] = make_pair(-10,  xD );       sort(rg[i].begin(), rg[i].end());       reverse(rg[i].begin(), rg[i].end());       cout << (rg[i][1].first == rg[i][2].first                    ?  ?                     : string(rg[i][0].second +     + rg[i][1].second))            << endl;     }   }   