Untitled

#include<stdio.h>

int prime(int n) // ham kiem tra so nguyen to
{
	return (n == 2 || n == 3 || n == 5 || n == 7 ||n == 11 ||n == 13 ||n == 17);
}

int leapYear(int n) // ham kiem tra nam nhuan
{
	return ((n%4==0) &&(n % 100 != 0) || (n % 400 == 0));
}


int main()
{
	int p,q,a,b,x,y;
	scanf("%d%d%d%d",&p,&q,&a,&b); // nhap 
	
	if(a % b == 0)
	{
		x = 0;
		y = 0;
	}
	else {
		double t = (double)a/ (double)b; // phep chia lay so thuc cua a va b
		
		int k = (int)(t*10) % 10 + (int)(t*100) % 10; // tong phan tram va phan 10
		
		if(prime(k)) 
			a *= 10;
		else 
			a *= 100;
		
		k = a / b ;                       // phep chia lay so nguyen 
		x = k / 10 % 10;                  // hang chuc 
		y = k / 100 % 10;				  // hang tram
	}
	
	int year = p*1000 + q*100 + x*10 + y;  // nam 
	
	if(leapYear(year)) printf("YES "); 
	else printf("NO  ");
	
	printf("%d",year);
}