#include <stdio.h>

int main()  
{  
    int i,x,n=0;  
    printf("Enter a positive number:\n");  
    scanf("%d", &x);  
    for(i = 2; i < x; i++)  
    { 
        if(x%i!=0)
    { n=1;  
        }
    else  
     {n=0;  
      break;}
    }

    if(n==1)
    {printf("prime");}
    else{printf("not prime");}
    return 0;  
}  

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