func_code_string: #include <bits/stdc++.h>   int main() {     int n, m, min_m, max_n, min_n, x;     scanf( %d%d , &n, &m);     scanf( %d , &max_n);     min_n = max_n;     n--;     while (n--) {       scanf( %d , &x);       if (x > max_n) {         max_n = x;       } else if (x < min_n) {         min_n = x;       }     }     scanf( %d , &min_m);     m--;     while (m--) {       scanf( %d , &x);       if (x < min_m) {         min_m = x;       }     }     if (min_m <= max_n) {       printf( -1 );       return 0;     }     int t = max_n;     while (t < min_m) {       if (2 * min_n <= t) {         printf( %d , t);         return 0;       }       t++;     }     printf( -1 );   }   