#include <iostream>
#include <cstring>
#include <string>
#include <cstdio>
#include <cmath>
//strlen scanf getline printf
/*int double bool
void
%c %d %lf
*/
using namespace std;
int main() {
	long long n, a = 1;cin>>n;
	if(n>=4){
		cout<<"Yes";
	}else{
		cout<<"No";
	}
	return 0;
}

过了？？？