题解 | #小乐乐是否被叫家长#

import java.util.Scanner;
public class Main {
    
    public static void main(String[] args) {
        
        Scanner sc = new Scanner(System.in);
        int sum = 0;
        while(sc.hasNextInt()) {
            sum += sc.nextInt();
        }
        double avg = sum*1.0 / 3;
        if(avg < 60) {
            System.out.println("YES");
        } else {
            System.out.println("NO");
        }
    }
}