List membership Testing using in | Part 8 | Python

Code: class Solution: def checkIfExist(self, arr: List[int]) -> bool: g=0; for i in arr: if(i*2 in arr and i!=0): g=1; break; elif(i*2 in arr and arr.count(2*i)>=2): g=1; break; if(g==0): return False; else: return True;

Problem Link: Check If N and Its Double Exist: https://leetcode.com/problems/check-i... Python for beginners: https://www.youtube.com/watch?v=egq7Z...