新手刷题

#include<bits/stdc++.h>
using namespace std;
bool run(int y)
{
    if((y%4 == 0 && y%100 != 0) || y%400 == 0)
    {
        return true;
    }
    else
    {
        return false;
    }
}
int main()
{
    int y;
    cin>>y;
    if(run(y))
    {
        cout<<"YES";
    }
    else
    {
        cout<<"NO";
    }
    return 0;
}