答案摆这还不抄！？

#include<bits/stdc++.h>
using namespace std;
void rn(int a){
if (a%400=0) cout<<"YES";
else if (a%100=0) cout<<"NO";
else if (a%4==0) cout<<"YES";
else cout<<"NO";
}
int main(){
int a;
cin>>a;
rn(a);
return 0;
}
//有不理解的私下来问我