func_code_string: #include <bits/stdc++.h>   using namespace std;   const int N = 105;   char s[N], t[N];   int dis(char a, char b) {     int t = abs(a - b);     return min(t, 26 - t);   }   int main() {     int n;     scanf( %d , &n);     scanf( %s , s + 1);     t[1] =  A , t[2] =  C , t[3] =  T , t[4] =  G ;     int ans = 1e9;     for (int i = 1; i + 3 <= n; i++) {       int sum = 0;       for (int j = 1; j <= 4; j++) sum += dis(t[j], s[i + j - 1]);       ans = min(ans, sum);     }     cout << ans;   }   