特简单

#include<iostream>
using namespace std;
bool runnian(int a){
if((a%40&&a%100!=0)||(a%1000&&a%400==0)){
return true;
}else{
return false;
}
}
int main(){
int n;
cin>>n;
if(runnian(n)==true){
cout<<"YES";
}else{
cout<<"NO";
}
return 0;
}