#include <stdio.h>
int main()
{
    int year;
    scanf("%d",&year);
    if(year<1000||year>3000)
    {
        printf("Invalid input");
        return 0;
    }
    if((year%d400==0)||(year%4==0&&year%100!=0))
    {
        printf("Leap year");
    }
    else
    {
        printf("Not a leap year");
    }
    return 0;
}