Minimum Impossible OR
Intuition\n Describe your first thoughts on how to solve this problem. \n\n# Approach\n Describe your approach to solving the problem. \n\n# Complexity\n- Time 
# Intuition\n<!-- Describe your first thoughts on how to solve this problem. -->\n\n# Approach\n<!-- Describe your approach to solving the problem. -->\n\n# Complexity\n- Time complexity:\n<!-- Add your time complexity here, e.g. $$O(n)$$ -->\n\n- Space complexity:\n<!-- Add your space complexity here, e.g. $$O(n)$$ -->\n\n# Code\n```python3 []\nclass Solution:\n    def minImpossibleOR(self, nums: List[int]) -> int:\n        i = 1\n        cnt = 1\n        nums = set(nums)\n        while True:\n            if i not in nums:\n                return i\n            i = 2**(cnt)\n            cnt += 1\n```
['Python3']