LEAP YEAR OR NOT IN C++

#include <iostream>
using namespace std;

int main ()
{
    int year;

    cout<<"PLEASE ENTER A YEAR : ";
    cin>>year;

if (year % 4 == 0)
{
if (year % 100 == 0)
{
if (year % 400 == 0)
{
cout<<year<<" THIS IS A LEAP YEAR"<<endl;

}
else
{
cout<<year<<" THIS IS NOT A LEAP YEAR"<<endl;
}

}
else
{
cout<<year<<" THIS IS A LEAP YEAR"<<endl;
}

}
else
{
cout<<year<<" THIS IS NOT A LEAP YEAR"<<endl;
}


    return 0;
}

OUTPUT