题解 | #牛牛的计划#

import java.util.Scanner;
public class Main {
    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        //计划的时间
        String str1y = scan.next();
        String str1m = scan.next();
        String str1d = scan.next();
        //询问时间
        String str2y = scan.next();
        String str2m = scan.next();
        String str2d = scan.next();
        
        int y1 = Integer.parseInt(str1y);
        int m1 = Integer.parseInt(str1m);
        int d1 = Integer.parseInt(str1d);
        
        int y2 = Integer.parseInt(str2y);
        int m2 = Integer.parseInt(str2m);
        int d2 = Integer.parseInt(str2d);
        
        if(y1 < y2) {
            System.out.println("yes");
        } else if(y1 == y2 && m1 < m2) {
            System.out.println("yes");
        } else if(y1 == y2 && m1 == m2 && d1 <= d2) {
            System.out.println("yes");
        } else {
            System.out.println("no");
        }
        
    }
}