func_code_string: #include <bits/stdc++.h>   using namespace std;   const long long mod = 1e9 + 7, mod2 = 998244353;   unsigned long long base = 131;   const int w = 1e7 + 5;   long long m, n;   int main() {     long long i, j, k, t, qqq;     cin >> n;     string a, b;     cin >> a >> b;     int flag = 0;     for (i = a.size() - 1; i >= 0; i--) {       int x = (b[i] -  a );       int y = (int)a[i] + x;       if (flag) y++, flag = 0;       if (y > (int) z ) y -= 26, flag++;       a[i] = (char)y;     }     if (flag) a.insert(a.begin(),  b );     flag = 0;     for (i = 0; i < a.size(); i++) {       int x = a[i] -  a ;       if (flag) x += 26, flag = 0;       int y = x % 2;       x /= 2;       a[i] = x +  a ;       if (y) flag = 1;     }     if (a.size() == n)       cout << a << endl;     else {       for (i = 1; i < a.size(); i++) printf( %c , a[i]);       cout << endl;     }     return 0;   }   