#include<stdio.h>
int main(){
	int a;
	scanf("%d",&a);
	if(a%2==0){
		printf("%s","yes");
	}
	return 0;
	
}
/**************************************************************
	Problem: 1640
	User: admin
	Language: C
	Result: Accepted
	Time:8 ms
	Memory:1144 kb
****************************************************************/