func_code_string: #include <bits/stdc++.h>   int main() {     int i, j, n, max = -1, count, a;     char c1, c2;     scanf( %d , &n);     char s[n];     scanf( %s , s);     for (i = 0; i < n - 1; i++) {       count = 0;       for (j = i + 1; j < n - 1; j++) {         if (s[j] == s[i]) {           if (s[j + 1] == s[i + 1]) count++;         }       }       if (count > max) {         max = count;         c1 = s[i];         c2 = s[i + 1];       }     }     printf( %c%c n , c1, c2);     return 0;   }   