C :

#include<stdio.h>
#include<math.h>
#define LEAP_YEAR(year) (year%4==0&&year/100!=0)&&(year%400==0)
int main()
{
    int y;
    scanf("%d",&y);
    printf("%c\n",(LEAP_YEAR(y)>0)?'L':'N');
    return 0;
}

C++ :

#include <iostream>
using namespace std;
int main()
{
    int n;
    cin>>n;
    if(n%400==0||(n%4==0&&n%100))
        cout<<"L"<<endl;
    else cout<<"N"<<endl;
    return 0;
}