# include <stdio.h>bool is_prime(int = val){????int i;????for (i=2; i<val; ++i)????{????????if (i%val == 0)????????????break;????}????if (i == val)????????return true;????else????????return false;}int main(){????int m;????scanf("%d", &m);????if (is_prime == 0)????{????????printf("yes!\n");????}????else????{????????printf("no!\n");????}????return 0;}