#1346

Check If N and Its Double Exist

pupil · 485 · lc easy +27 · verified · 41.7% accepted · 2,517 likes · top 22%

Description

Given an integer array arr, determine whether there exist two distinct indices i and j (with i != j, both in bounds) such that arr[i] == 2 * arr[j].

Example 1:

Input: arr = [10,2,5,3]

Output: true

Explanation: For i = 0 and j = 2, arr[i] == 10 == 2 * 5 == 2 * arr[j]

Example 2:

Input: arr = [3,1,7,11]

Output: false

Explanation: There is no i and j that satisfy the conditions.

Code

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class Solution:
    def checkIfExist(self, arr: List[int]) -> bool:

class Solution:
    def checkIfExist(self, arr: List[int]) -> bool: