func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int a[20];     a[0] = 2;     a[1] = 3;     a[2] = 5;     a[3] = 7;     a[4] = 11;     a[5] = 13;     a[6] = 17;     a[7] = 19;     a[8] = 23;     a[9] = 29;     a[10] = 31;     a[11] = 37;     a[12] = 41;     a[13] = 43;     a[14] = 47;     a[15] = 4;     a[16] = 9;     a[17] = 25;     a[18] = 49;     char s[10];     long int i, flag = 0;     for (i = 0; i <= 18; i++) {       printf( %ld n , a[i]);       fflush(stdout);       scanf( %s , s);       if (s[0] ==  y ) {         flag++;       }       if (flag == 2) {         printf( composite n );         fflush(stdout);         break;       }     }     if (flag < 2) printf( prime n );     return 0;   }   