题解 | #小乐乐算多少人被请家长#

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 in = new Scanner(System.in);
        /**
        3
        80 100 90
        40 70 65
        20 84 93
        */
        int num = in.nextInt();
        int[][] score = new int[num][3];
        for (int i = 0; i < num; i++) {
            for (int j = 0; j < score[i].length; j++) {
                score[i][j] = in.nextInt();
            }
        }
        int d = 0;
        for (int i = 0; i < num; i++) {
            int sum = 0;
            int avg;
            for (int j = 0; j < score[i].length; j++) {
                sum += score[i][j];
            }
            avg = sum / 3;
            if (avg < 60) {
                d++;
            }
        }
        System.out.println(d);
    }
}