C :

#define LEAPYEAR(y) !(y%4)&&((y%100)||!(y%400))  
main()  
{int y;  
scanf("%d",&y);  
if(LEAPYEAR(y)) printf("L");  
else printf("N");  
}

C++ :

#include<iostream>
#define LEAP_YEAR y
using namespace std;
int main()
{
	int a;
    cin>>a;
    if(a%4==0){
    	if(a%100==0)  
    	{
	    	if(a%400==0)  cout<<'L';
	    	if(a%400!=0)   cout<<'N';
	    }
    	if(a%100!=0)  cout<<'L';
    }
    if(a%4!=0)  cout<<'N'; 
}

Java :

import java.util.Scanner;

public class Main
{
	public static void main(String args[])
	{
		Scanner in=new Scanner(System.in);
		int year=in.nextInt();
		if(isleapyear(year)==1)System.out.println("L");
		else System.out.println("N");
	}
	public static int isleapyear(int n)
	{
		if((n%400==0)||(n%100!=0&&n%4==0))return 1;
		else return 0;
	}
}

Python :

a = map(lambda x:float(x), raw_input().split())[0]
if (a % 4 == 0 and a%100 !=0) or a %400 ==0:
    print 'L'
else:
    print 'N'

C# :

using System;
namespace mmm
{
    class Program
    {
        static void Main(string[] args)
        {
            int a;
            a = Convert.ToInt32(Console.ReadLine());
            if (a % 4 == 0&&a%100!=0||a%400==0)
            {
                Console.WriteLine("L");
            }
            else
            {
                Console.WriteLine("N");
            }
        }
    }
}