C :

#include <stdio.h>
#define LEAP_YEAR(y) 
int main()
{ 
	int y;
	scanf("%d",&y);
	{
		if(y%4==0&&y%100>0)
			printf("L\n");
		else if(y%400==0)
			printf("L\n");
		else
			printf("N\n");
	}
	return 0;
}

C++ :

#include "stdio.h"
#define LEAP_YEAR(y) if(y%400==0||(y%4==0&&y%100!=0)) i=1;else i=0;
int main(int argc, char* argv[])
{ 
	int y,i;
  while(~scanf("%d",&y))
  {
    LEAP_YEAR(y);
	printf(i==1?"L\n":"N\n");
  }  
	return 0;
}