func_code_string: #include <bits/stdc++.h>   using namespace std;   struct block {     string str;     int pos;   };   static bool compare(block b1, block b2) {     int n = b1.str.length();     for (int i = 0; i < n; i++) {       if (b1.str[i] != b2.str[i]) {         if ((i + 1) % 2) {           return (b1.str[i] < b2.str[i]);         } else {           return (b1.str[i] > b2.str[i]);         }       }     }   }   int main() {     int n, m;     cin >> n >> m;     vector<block> arr(n);     for (int i = 0; i < n; i++) {       cin >> arr[i].str;       arr[i].pos = i + 1;     }     sort(arr.begin(), arr.end(), compare);     for (int i = 0; i < n; i++) {       cout << arr[i].pos <<    ;     }   }   