leetcode-12双周赛-1244-力扣排行榜

题目描述：

class Leaderboard:
 
    def __init__(self):
        self.map = collections.Counter()
 
    def addScore(self, playerId: int, score: int) -> None:
        self.map[playerId] += score
 
    def top(self, K: int) -> int:
        return sum(sorted(self.map.values(),reverse = True)[:K])
 
    def reset(self, playerId: int) -> None:
        self.map[playerId] = 0
 
# Your Leaderboard object will be instantiated and called as such:
# obj = Leaderboard()
# obj.addScore(playerId,score)
# param_2 = obj.top(K)
# obj.reset(playerId)