Leetcode 1468 Solution

This article provides solution to leetcode question 1468 (check-if-n-and-its-double-exist)

https://leetcode.com/problems/check-if-n-and-its-double-exist

Solution

class Solution: def checkIfExist(self, arr: List[int]) -> bool: m = collections.defaultdict(int)
for ele in arr: m[ele] += 1
for ele in arr: if ele == 0: if ele in m and m[ele] >= 2: return True else: if 2 * ele in m: return True
return False