import java.util.*;

public class LeapYear{
   public static boolean isLeapYear(int year) {

    if (year < 0) {
      return false;
    }
    if (year % 4 == 0) {
      return true;
    }  else if (year % 400 == 0) {
      return true;
    } 
    else if (year % 100 == 0) {
      return false;
    }
    else {
      return false;
    }
  }
public static void main(String[] args){
    Scanner in = new Scanner(System.in);
    System.out.println("Enter any year:" );
    int y = in.nextInt();
        LeapYear year = new LeapYear();
    if (year.isLeapYear(y)){
    System.out.println("It is a leap year.");
    }           
    else{
    System.out.println("It is not a leap year.");
    }
}
}