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题目描述

新一轮的「力扣杯」编程大赛即将启动,为了动态显示参赛者的得分数据,需要设计一个排行榜 Leaderboard。

请你帮忙来设计这个 Leaderboard 类,使得它有如下 3 个函数:

  1. addScore(playerId, score)
    <ul>
    	<li>假如参赛者已经在排行榜上,就给他的当前得分增加 <code>score</code> 点分值并更新排行。</li>
    	<li>假如该参赛者不在排行榜上,就把他添加到榜单上,并且将分数设置为 <code>score</code>。</li>
    </ul>
    </li>
    <li><code>top(K)</code>:返回前 <code>K</code> 名参赛者的 <strong>得分总和</strong>。</li>
    <li><code>reset(playerId)</code>:将指定参赛者的成绩清零。题目保证在调用此函数前,该参赛者已有成绩,并且在榜单上。</li>
    

请注意,在初始状态下,排行榜是空的。

 

示例 1:

输入: 
["Leaderboard","addScore","addScore","addScore","addScore","addScore","top","reset","reset","addScore","top"]
[[],[1,73],[2,56],[3,39],[4,51],[5,4],[1],[1],[2],[2,51],[3]]
输出:
[null,null,null,null,null,null,73,null,null,null,141]

解释: 
Leaderboard leaderboard = new Leaderboard ();
leaderboard.addScore(1,73);   // leaderboard = [[1,73]];
leaderboard.addScore(2,56);   // leaderboard = [[1,73],[2,56]];
leaderboard.addScore(3,39);   // leaderboard = [[1,73],[2,56],[3,39]];
leaderboard.addScore(4,51);   // leaderboard = [[1,73],[2,56],[3,39],[4,51]];
leaderboard.addScore(5,4);    // leaderboard = [[1,73],[2,56],[3,39],[4,51],[5,4]];
leaderboard.top(1);           // returns 73;
leaderboard.reset(1);         // leaderboard = [[2,56],[3,39],[4,51],[5,4]];
leaderboard.reset(2);         // leaderboard = [[3,39],[4,51],[5,4]];
leaderboard.addScore(2,51);   // leaderboard = [[2,51],[3,39],[4,51],[5,4]];
leaderboard.top(3);           // returns 141 = 51 + 51 + 39;

 

提示:

  • 1 <= playerId, K <= 10000
  • 题目保证 K 小于或等于当前参赛者的数量
  • 1 <= score <= 100
  • 最多进行 1000 次函数调用

解法

Python3

Java

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