My python code:
In this im using hashmap and comparing before inserting the element of the array into the hashmap and return True if the element is already present…

class Solution(object):
    def containsDuplicate(self, nums):
        """
        :type nums: List[int]
        :rtype: bool
        """
        map={}
        for i in range(len(nums)):
            if nums[i] in map:
                return True
            map[i]=nums[i]
        return False

This code is giving me wrong answer for [3,3] i.e. false but expected output is true
i tried doing dry run for this but im getting true according to my code
Please tell me if im making any mistake