func_code_string: #include <bits/stdc++.h>   int main() {     int i, j, k, n, t, c1, c2, c3, c4, c5;     scanf( %d%d%d%d%d , &c1, &c2, &c3, &c4, &c5);     t = c1 + c2 + c3 + c4 + c5;     if (t == 0)       printf( -1 n );     else if (t % 5 == 0)       printf( %d n , t / 5);     else       printf( -1 n );   }   