#include <stdio.h>
#include<conio.h>
int main()
{
    int n, i;
    printf("nhap vao n:");
    scanf("%d", &n);
    if (n < 2) {
        printf("%d khong la so nguyen to", n);
    }
    else {
        printf("%d la so nguyen to", n);
        for (i = 2; i < n; i++){
            if (n%i == 0)
            {
                printf("%d khong la so nguyen to", n);
                break;
            }
        }
    }
    getch();
    return 0;
}