public class LeapYear {
        public static void main(String[] args) {
            Scanner scan = new Scanner(System.in);
            System.out.print("请输入2000~3000内的年数!");
            int year = scan.nextInt();
            scan.close();


            if (year < 2000 || year > 3000) {
                System.out.println("请输入2000~3000内的年数!");
                return;
            }


            boolean isLeap = false;
            if ((year % 4 == 0 && year % 100 != 0) || (year % 400 == 0)) {
                isLeap = true;
            }


            if (isLeap) {
                System.out.println(year + "年是闰年");
            } else {
                System.out.println(year + "年不是闰年");
            }
        }
    }