from random import choice
class RandomizedCollection:
def __init__(self):
self.values = []
def insert(self, val: int) -> bool:
exist = not val in self.values
self.values.append(val)
return exist
def remove(self, val: int) -> bool:
exist = val in self.values
if val in self.values:
self.values.remove(val)
return exist
def getRandom(self) -> int:
return choice(self.values)
# Your RandomizedCollection object will be instantiated and called as such:
# obj = RandomizedCollection()
# param_1 = obj.insert(val)
# param_2 = obj.remove(val)
# param_3 = obj.getRandom()