#include <stdio.h>
int main(){
    
    int year;
    scanf("%d", &year);
    
if (year %100 == 0) {
    if (year%400==0) {
    printf("Leap year");
    }
}
else {
    printf("Not a leap year");
    
}
}
else {
    if(year%4==0){
        printf("Leap year")
    }
}