func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     cin.tie(NULL);     cout.tie(NULL);     ios_base::sync_with_stdio(false);     int n;     cin >> n;     vector<string> arr;     for (int i = 0; i < n; i++) {       string x;       cin >> x;       arr.push_back(x);     }     int chocolate = 0;     for (int i = 0; i < n; i++) {       int temp = 0;       temp = count(arr[i].begin(), arr[i].end(),  C );       chocolate += (temp * (temp - 1)) / 2;     }     for (int i = 0; i < n; i++) {       int temp = 0;       for (int j = 0; j < n; j++) {         if (arr[j][i] ==  C ) {           temp += 1;         }       }       chocolate += (temp * (temp - 1)) / 2;     }     cout << chocolate << endl;     return 0;   }   