题解 | #成绩排序#

我直接无脑用对象加列表

import java.util.Scanner;
import java.util.*;

public class Main {
    public static void main(String[] args) {
        class Student {
            String name;
            int grade;
            public Student(String n, int g) {
                name = n;
                grade = g;
            }
            @Override
            public String toString() {
                return name + " " + grade;
            }
        }

        Scanner in = new Scanner(System.in);
        while (in.hasNextInt()) {
            // 构建list
            List<Student> studentList = new ArrayList<>();
            int sortNum = in.nextInt();
            int sortFlag = in.nextInt();
            for (int i = 0; i < sortNum; i++) {
                studentList.add(new Student(in.next(), in.nextInt()));
            }

            // 排序
            if (sortFlag == 0) { // 降序
                studentList.sort(Collections.reverseOrder(Comparator.comparing(s -> s.grade)));
            } else { // 升序
                studentList.sort(Comparator.comparing(s -> s.grade));
            }

            // 打印
            studentList.forEach(System.out::println);
        }
    }
}