#include<stdio.h>
int main(){
	int x;
	scanf("%d",&x);
	if(x%2==0){
		printf("%s","y e s");
	}else{
		printf("%s","n o");
	}
	return 0;
} 
/**************************************************************
	Problem: 1033
	User: admin
	Language: C
	Result: Accepted
	Time:9 ms
	Memory:1144 kb
****************************************************************/