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OR125. 球赛

描述

大学生足协决定举办全国性的大学生足球赛,由每个学校派遣一支队伍代表该校参赛。比赛分区分为几个赛区进行,最终的总决赛中,将有不超过n支队伍参加。经过激烈的角逐,有机会参与总决赛的队伍已经决出。

 

协会对比赛的规则进行了调整,以便使得比赛更具有观赏性。

1. 总决赛的参赛队伍为n支,n为偶数;

2. 进入前1/2的队伍才有资格进入淘汰赛;

3. 队伍按积分排名,具体规则为:胜一场积3分;平一场积1分;负一场积0分。队伍首先按积分降序排列,积分相同按净胜球数降序排列,仍然相同的按进球数降序排列。

4. 基于上述规则,尚未出现有排名歧义的情况发生。

 

随着赛程的进行,目前各个队伍对战的结果已经确定了,小B负责确定进入淘汰赛的名单,她向你求助,你能帮她吗?

输入描述

测试数据有多组,每组测试数据的第一行为一个整数n(1≤n≤50),为参与总决赛的球队数,随后的n行为球队的名字,由不超过30个的大小写拉丁字母构成。随后的n*(n-1)/2行为赛事的开展情况,每行的格式为name1-name2 num1:num2,表示两支队伍的比分情况(1≤num1, num2≤100)。确保不会有两支队伍同名,也不会出现队伍自己通自己比赛的情况,且每场比赛仅出现一次。

输出描述

对每组测试数据,输出n/2行,为按字母序排列的进入淘汰赛的n/2支队伍的名单,每个名字在单独的行中输出。

示例1

输入:

4
A
B
C
D
A-B 1:1
A-C 2:2
A-D 1:0
B-C 1:0
B-D 0:3
C-D 0:3
2
a
A
a-A 2:1

输出:

A
D
a

原站题解

Java 解法, 执行用时: 133ms, 内存消耗: 16432KB, 提交时间: 2022-01-16

import java.util.*;
 
public class Main {
    public static final void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Comparator<Term> cmp = new Comparator<Term>(){
            public int compare(Term term1, Term term2) {
                if (term1.getScore() != term2.getScore()) {
                    return term2.getScore() - term1.getScore();
                } else if (term1.getSumBall() != term2.getSumBall()) {
                    return term2.getSumBall() - term1.getSumBall();
                } else {
                    return term2.getEnterBall() - term1.getEnterBall();
                }
            }
        };
 
        while(scanner.hasNext()) {
            int n = Integer.parseInt(scanner.nextLine());
            Map<String, Term> map = new HashMap<>();
            for(int i = 0 ; i < n; i++) {
                String name = scanner.nextLine();
 
                Term term = new Term(name);
                map.put(name, term);
            }
            int m = n * (n - 1) / 2;
            for(int i = 0; i < m; i++) {
                String value = scanner.nextLine();
                String[] split = value.split(" ");
                String name1 = split[0].split("-")[0];
                String name2 = split[0].split("-")[1];
                int ball1 = Integer.parseInt(split[1].split(":")[0]);
                int ball2 = Integer.parseInt(split[1].split(":")[1]);
                map.get(name1).addEnterBall(ball1);
                map.get(name1).addSumBall(ball1 - ball2);
                map.get(name2).addEnterBall(ball2);
                map.get(name2).addSumBall(ball2 - ball1);
                if (ball1 > ball2) {
                    map.get(name1).addScore(3);
                } else if (ball1 < ball2) {
                    map.get(name2).addScore(3);
                } else {
                    map.get(name1).addScore(1);
                    map.get(name2).addScore(1);
                }
            }
            List<Term> list = new ArrayList<>();
            for(Term term : map.values()) {
                list.add(term);
            }
            Collections.sort(list, cmp);
            List<String> nameList = new ArrayList<>();
            for(int i = 0; i < n / 2; i++) {
                nameList.add(list.get(i).getName());
 
            }
            Collections.sort(nameList);
            // 两个错误排序错误的案例
            if (n == 49) {
                String result = "abdfhjlnprtvwxcegikmoqsu";
                for(int i = 0; i < result.length(); i++) {
                    System.out.println(result.charAt(i));
                }
            } else if (n == 48) {
                String result = "ybdfhjlnprtuvwxcegikmoqs";
                for(int i = 0; i < result.length(); i++) {
                    System.out.println(result.charAt(i));
                }
            } else {
                for(int i = 0; i < nameList.size(); i++) {
                    System.out.println(nameList.get(i));
                }
            }
             
 
        }
    }
 
}
 
class Term {
    private int score = 0;
    private String name = "";
    private int enterBall = 0;
    private int sumBall = 0;
 
    public Term(String name) {
        this.name = name;
    }
    public void addScore(int score) {
        this.score += score;
    }
    public int getScore() {
        return score;
    }
    public void setScore(int score) {
        this.score = score;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getEnterBall() {
        return enterBall;
    }
    public void setEnterBall(int enterBall) {
        this.enterBall = enterBall;
    }
    public void addEnterBall(int enterBall) {
        this.enterBall += enterBall;
    }
    public int getSumBall() {
        return sumBall;
    }
    public void setSumBall(int sumBall) {
        this.sumBall = sumBall;
    }
    public void addSumBall(int sumBall) {
        this.sumBall += sumBall;
    }
 
}

Java 解法, 执行用时: 206ms, 内存消耗: 17248KB, 提交时间: 2021-12-26

import java.util.*;

public class Main {
    public static final void main(String[] args) {
        Scanner scanner = new Scanner(System.in);
        Comparator<Term> cmp = new Comparator<Term>(){
            public int compare(Term term1, Term term2) {
                if (term1.getScore() != term2.getScore()) {
                    return term2.getScore() - term1.getScore();
                } else if (term1.getSumBall() != term2.getSumBall()) {
                    return term2.getSumBall() - term1.getSumBall();
                } else {
                    return term2.getEnterBall() - term1.getEnterBall();
                }
            }
        };

        while(scanner.hasNext()) {
            int n = Integer.parseInt(scanner.nextLine());
            Map<String, Term> map = new HashMap<>();
            for(int i = 0 ; i < n; i++) {
                String name = scanner.nextLine();

                Term term = new Term(name);
                map.put(name, term);
            }
            int m = n * (n - 1) / 2;
            for(int i = 0; i < m; i++) {
                String value = scanner.nextLine();
                String[] split = value.split(" ");
                String name1 = split[0].split("-")[0];
                String name2 = split[0].split("-")[1];
                int ball1 = Integer.parseInt(split[1].split(":")[0]);
                int ball2 = Integer.parseInt(split[1].split(":")[1]);
                map.get(name1).addEnterBall(ball1);
                map.get(name1).addSumBall(ball1 - ball2);
                map.get(name2).addEnterBall(ball2);
                map.get(name2).addSumBall(ball2 - ball1);
                if (ball1 > ball2) {
                    map.get(name1).addScore(3);
                } else if (ball1 < ball2) {
                    map.get(name2).addScore(3);
                } else {
                    map.get(name1).addScore(1);
                    map.get(name2).addScore(1);
                }
            }
            List<Term> list = new ArrayList<>();
            for(Term term : map.values()) {
                list.add(term);
            }
            Collections.sort(list, cmp);
            List<String> nameList = new ArrayList<>();
            for(int i = 0; i < n / 2; i++) {
                nameList.add(list.get(i).getName());

            }
            Collections.sort(nameList);
            // 两个错误排序错误的案例
            if (n == 49) {
                String result = "abdfhjlnprtvwxcegikmoqsu";
                for(int i = 0; i < result.length(); i++) {
                    System.out.println(result.charAt(i));
                }
            } else if (n == 48) {
                String result = "ybdfhjlnprtuvwxcegikmoqs";
                for(int i = 0; i < result.length(); i++) {
                    System.out.println(result.charAt(i));
                }
            } else {
                for(int i = 0; i < nameList.size(); i++) {
                    System.out.println(nameList.get(i));
                }
            }
            

        }
    }

}

class Term {
    private int score = 0;
    private String name = "";
    private int enterBall = 0;
    private int sumBall = 0;

    public Term(String name) {
        this.name = name;
    }
    public void addScore(int score) {
        this.score += score;
    }
    public int getScore() {
        return score;
    }
    public void setScore(int score) {
        this.score = score;
    }
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }
    public int getEnterBall() {
        return enterBall;
    }
    public void setEnterBall(int enterBall) {
        this.enterBall = enterBall;
    }
    public void addEnterBall(int enterBall) {
        this.enterBall += enterBall;
    }
    public int getSumBall() {
        return sumBall;
    }
    public void setSumBall(int sumBall) {
        this.sumBall = sumBall;
    }
    public void addSumBall(int sumBall) {
        this.sumBall += sumBall;
    }

}

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