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Commit 6db6506

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feat: add solutions to leetcode problem: No.1244. Design A Leaderboard
1 parent fca4e53 commit 6db6506

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4 files changed

+164
-5
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4 files changed

+164
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‎solution/1200-1299/1244.Design A Leaderboard/README.md

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<ol>
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<li><code>addScore(playerId, score)</code>:
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<ul>
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<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>
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<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>
@@ -60,27 +59,82 @@ leaderboard.top(3); // returns 141 =わ 51 +たす 51 +たす 39;
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<li>最多进行 <code>1000</code> 次函数调用</li>
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</ul>
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## 解法
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<!-- 这里可写通用的实现逻辑 -->
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用哈希表存放每个 playerId 所对应的分数。
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计算 topK 时,取出所有的分数,进行排序,获取前 K 个分数,累加得到结果。
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<!-- tabs:start -->
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### **Python3**
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<!-- 这里可写当前语言的特殊实现逻辑 -->
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```python
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class Leaderboard:
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def __init__(self):
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self.player_scores = {}
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def addScore(self, playerId: int, score: int) -> None:
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self.player_scores[playerId] = self.player_scores.get(playerId, 0) + score
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def top(self, K: int) -> int:
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scores = sorted(list(self.player_scores.values()), reverse=True)
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return sum(scores[:K])
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def reset(self, playerId: int) -> None:
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self.player_scores[playerId] = 0
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# Your Leaderboard object will be instantiated and called as such:
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# obj = Leaderboard()
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# obj.addScore(playerId,score)
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# param_2 = obj.top(K)
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# obj.reset(playerId)
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```
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### **Java**
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<!-- 这里可写当前语言的特殊实现逻辑 -->
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```java
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class Leaderboard {
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private Map<Integer, Integer> playerScores;
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public Leaderboard() {
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playerScores = new HashMap<>();
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}
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public void addScore(int playerId, int score) {
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playerScores.put(playerId, playerScores.getOrDefault(playerId, 0) + score);
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}
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public int top(int K) {
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List<Integer> scores = new ArrayList<>(playerScores.values());
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Collections.sort(scores, Collections.reverseOrder());
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int res = 0;
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for (int i = 0; i < K; ++i) {
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res += scores.get(i);
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}
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return res;
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}
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public void reset(int playerId) {
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playerScores.put(playerId, 0);
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}
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}
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/**
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* Your Leaderboard object will be instantiated and called as such:
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* Leaderboard obj = new Leaderboard();
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* obj.addScore(playerId,score);
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* int param_2 = obj.top(K);
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* obj.reset(playerId);
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*/
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```
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### **...**

‎solution/1200-1299/1244.Design A Leaderboard/README_EN.md

Lines changed: 53 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -48,21 +48,72 @@ leaderboard.top(3); // returns 141 =わ 51 +たす 51 +たす 39;
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<li>There will be at most <code>1000</code>&nbsp;function calls.</li>
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</ul>
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## Solutions
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<!-- tabs:start -->
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### **Python3**
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```python
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class Leaderboard:
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def __init__(self):
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self.player_scores = {}
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def addScore(self, playerId: int, score: int) -> None:
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self.player_scores[playerId] = self.player_scores.get(playerId, 0) + score
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def top(self, K: int) -> int:
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scores = sorted(list(self.player_scores.values()), reverse=True)
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return sum(scores[:K])
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def reset(self, playerId: int) -> None:
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self.player_scores[playerId] = 0
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# Your Leaderboard object will be instantiated and called as such:
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# obj = Leaderboard()
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# obj.addScore(playerId,score)
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# param_2 = obj.top(K)
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# obj.reset(playerId)
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```
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### **Java**
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```java
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class Leaderboard {
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private Map<Integer, Integer> playerScores;
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public Leaderboard() {
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playerScores = new HashMap<>();
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}
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public void addScore(int playerId, int score) {
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playerScores.put(playerId, playerScores.getOrDefault(playerId, 0) + score);
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}
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public int top(int K) {
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List<Integer> scores = new ArrayList<>(playerScores.values());
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Collections.sort(scores, Collections.reverseOrder());
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int res = 0;
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for (int i = 0; i < K; ++i) {
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res += scores.get(i);
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}
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return res;
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}
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public void reset(int playerId) {
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playerScores.put(playerId, 0);
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}
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}
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/**
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* Your Leaderboard object will be instantiated and called as such:
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* Leaderboard obj = new Leaderboard();
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* obj.addScore(playerId,score);
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* int param_2 = obj.top(K);
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* obj.reset(playerId);
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*/
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```
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### **...**
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Original file line numberDiff line numberDiff line change
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class Leaderboard {
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private Map<Integer, Integer> playerScores;
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public Leaderboard() {
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playerScores = new HashMap<>();
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}
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public void addScore(int playerId, int score) {
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playerScores.put(playerId, playerScores.getOrDefault(playerId, 0) + score);
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}
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public int top(int K) {
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List<Integer> scores = new ArrayList<>(playerScores.values());
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Collections.sort(scores, Collections.reverseOrder());
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int res = 0;
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for (int i = 0; i < K; ++i) {
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res += scores.get(i);
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}
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return res;
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}
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public void reset(int playerId) {
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playerScores.put(playerId, 0);
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}
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}
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/**
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* Your Leaderboard object will be instantiated and called as such:
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* Leaderboard obj = new Leaderboard();
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* obj.addScore(playerId,score);
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* int param_2 = obj.top(K);
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* obj.reset(playerId);
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*/
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Original file line numberDiff line numberDiff line change
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class Leaderboard:
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def __init__(self):
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self.player_scores = {}
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def addScore(self, playerId: int, score: int) -> None:
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self.player_scores[playerId] = self.player_scores.get(playerId, 0) + score
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def top(self, K: int) -> int:
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scores = sorted(list(self.player_scores.values()), reverse=True)
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return sum(scores[:K])
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def reset(self, playerId: int) -> None:
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self.player_scores[playerId] = 0
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# Your Leaderboard object will be instantiated and called as such:
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# obj = Leaderboard()
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# obj.addScore(playerId,score)
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# param_2 = obj.top(K)
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# obj.reset(playerId)

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