Python solution


  • -2
    import random
    
    class RandomizedSet(object):
    
        def __init__(self):
            self.nums= list()
            
    
        def insert(self, val):
            """
            Inserts a value to the set. Returns true if the set did not already contain the specified element.
            :type val: int
            :rtype: bool
            """
            if val not in self.nums:
                self.nums.append(val)
                return True
            return False
            
    
        def remove(self, val):
            """
            Removes a value from the set. Returns true if the set contained the specified element.
            :type val: int
            :rtype: bool
            """
            if val in self.nums:
                self.nums.remove(val)
                return True
            return False
    
        def getRandom(self):
            """
            Get a random element from the set.
            :rtype: int
            """
            return random.choice(self.nums)
    

  • -2
    M
    This post is deleted!

  • 0
    W

    Totally wrong. not O(1).


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