题解 | #成绩排序#

import java.util.*;

// 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);
        int n = Integer.valueOf(in.nextLine());
        int sort = Integer.valueOf(in.nextLine());
        List<String> strings = new ArrayList<>(n);
        for (int i = 0; i < n; i++) {
            strings.add(in.nextLine());
        }
        Collections.sort(strings, (a, b) -> {
            int i = Integer.valueOf(a.split(" ")[1]).compareTo(Integer.valueOf(b.split(" ")[1]));
            return sort == 1 ? i : -i;
        });
        for (String s : strings) {
            System.out.println(s);
        }
    }
}