#include<iostream>
#include<cmath>
using namespace std;
int main()
{
int n;
cin>>n;
if(n%2==0)
cout<<"yes"<<endl;
else
cout<<"no"<<endl;
return 0;
}

#include<iostream>
#include<cmath>
using namespace std;
int main()
{
int n;
cin>>n;
if(n%2==0)
cout<<"yes";
else
cout<<"no";
return 0;
}

#include<iostream>
template<class T>
bool bj(T n){if(n%2==0) return true;return false;}
int main(){
    int n; std::cin>>n;
    if(bj(n)){std::cout<<"yes";return 0;}
    std::cout<<"no";
    return 0;
}