[LeetCode] 380. Insert Delete GetRandom O(1)

竟然不需要import random，击败了5%的O（1）哈哈哈

class RandomizedSet:

    def __init__(self):
        self.data = []

    def insert(self, val: int) -> bool:
        if val in self.data:
            return False
        else:
            self.data.append(val)
            return True

    def remove(self, val: int) -> bool:
        if val in self.data:
            self.data.remove(val)
            return True
        else:
            return False

    def getRandom(self) -> int:
        return self.data[random.randint(0,len(self.data) -1)]


# Your RandomizedSet object will be instantiated and called as such:
# obj = RandomizedSet()
# param_1 = obj.insert(val)
# param_2 = obj.remove(val)
# param_3 = obj.getRandom()

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