题解 | #小乐乐是否被叫家长#

import java.util.Scanner;

// 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 math = sc.nextInt();
        int chinese = sc.nextInt();
        int english = sc.nextInt();
        double avg = (double)(math+chinese+english)/3;
        if(avg>=60){
            System.out.println("NO");
        }else{
            System.out.println("YES");
        }
    }
}