func_code_string: #include <bits/stdc++.h>   using namespace std;   void solve() {     int n, m;     cin >> n >> m;     vector<pair<string, int>> a(n);     int c = 1;     for (auto &t : a) {       cin >> t.first;       t.second = c++;     }     for (auto &t : a) {       for (int i = 1; i < m; i += 2) {         t.first[i] =  z  - t.first[i] +  a ;       }     }     sort(a.begin(), a.end());     for (auto t : a) {       cout << t.second <<    ;     }   }   int main() {     solve();     return 0;   }   