func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int n;     cin >> n;     string s;     cin >> s;     string gen =  ACTG ;     int sum = 10000;     vector<bool> used_big(n, false);     vector<bool> used_gen(4, false);     for (int i = 0; i <= n - 4; i++) {       int tmp_sum = 0;       for (int j = 0; j < 4; j++) {         int dif = abs(s[i + j] - gen[j]);         if (26 - dif < dif) dif = 26 - dif;         tmp_sum += dif;       }       if (tmp_sum < sum) sum = tmp_sum;     }     cout << sum;   }   