Scores and Top-K Totals on a Leaderboard

### Problem Implement Leaderboard, initially empty. addScore(playerId,score) adds to an existing player's score or creates that player with score. top(K) returns the sum of the K largest current player scores. reset(playerId) removes that player, equivalently resetting their accumulated score to zero before a later add. The source guarantees the player was previously added before reset. ```cpp class Leaderboard { public: Leaderboard(); void addScore(int playerId, int score); int top(int K); void reset(int playerId); }; ``` ### Examples **Example 1:** ```text Input: construct Leaderboard(); addScore(4,8); addScore(7,6); addScore(4,3); top(2); reset(4); top(1) Output: top results17,6 Explanation: The two scores are11 and6 before reset, then only player7 remains. ``` **Example 2:** ```text Input: construct Leaderboard(); addScore(2,5); reset(2); addScore(2,4); top(1) Output: 4 Explanation: A reset does not carry the earlier5 into the new score. ``` ### Constraints - Both playerId and K are integers in `[1,10000]`. - K is at most the current number of players. - Each added score is an integer from 1 through 100. - At most 1000 function calls occur. - A reset names a player that was previously added. ### Contract considerations Keep the constructor and addScore/top/reset methods; the source guarantees K does not exceed the current player count. ```hint Read the boundary condition After reset and a later addScore for the same ID, do scores from before reset still contribute? ``` ### Boundary reminders Keep the constructor and addScore/top/reset methods; the source guarantees K does not exceed the current player count.