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);
        List<person> result = new ArrayList<>();
        // 注意 hasNext 和 hasNextLine 的区别
        while (in.hasNext()) { // 注意 while 处理多个 case
            int n = in.nextInt();
            int sort = in.nextInt();
            List<person> list = new ArrayList<>();
            for(int i=0;i<n;i++){
                String name = in.next();
                int score = in.nextInt();
                person p = new person();
                p.name = name;
                p.score = score;
                list.add(p);
            }
            // 倒序
            if ( sort == 0){
                list.sort( (p2,p1) -> p1.score - p2.score );
            }
            // 正序
            else if (sort == 1) {
                list.sort( (p1,p2) -> p1.score - p2.score);
            }
            result.addAll(list);
        }
        for(person p : result){
            System.out.println(p.name + " " + p.score);
        }
    }
}
class person
{
    String name;
    int score;
}