#include <stdio.h>
int main()
{
	int n, i;
	printf("Vui long nhap so can kiem tra:");
	scanf_s("%d%", &n);
	if (n <= 1)
		printf("Vui long nhap lai");
	for (i = 2; i < n; i++)
	{
		if (n % i == 0)
			printf("Day khong la so chinh phuong");
		else
			printf("Day  la so chinh phuong");
	}
	return 0;
}