题解 | #牛牛的计划#

import java.util.Scanner;

import java.time.LocalDate;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
      Scanner sc = new Scanner(System.in);
      int y1 = sc.nextInt();
      int m1 = sc.nextInt();
      int d1 = sc.nextInt();

      int y2 = sc.nextInt();
      int m2 = sc.nextInt();
      int d2 = sc.nextInt();

      LocalDate date1 = LocalDate.of(y1,m1,d1);
      LocalDate date2 = LocalDate.of(y2,m2,d2);

      int i = date1.compareTo(date2);
      if(i>0){
        System.out.println("no");
      }else{
        System.out.println("yes");
      }
    }
}