func_code_string: #include <bits/stdc++.h>   using namespace std;   int n;   string a;   constexpr char t[4] = { A ,  C ,  T ,  G };   int best = INT_MAX;   int main() {     cin >> n;     cin >> a;     for (int i = 0; i < n - 3; ++i) {       int cur = 0;       for (int j = 0; j < 4; ++j) {         int temp = min(abs(t[j] - a[i + j]), abs(t[j] + 26 - a[i + j]));         temp = min(temp, abs(t[j] - a[i + j] - 26));         cur += temp;       }       best = min(best, cur);     }     cout << best;     return 0;   }   