Problems ListLonely Integer
Easy
Given an integer array where each number occurs twice except for one of them, find the unique number.
Example:
Input: nums = [1, 3, 3, 2, 1]
Output: 2
Constraints:
numscontains at least one element.
Problems ListProblems ListGiven an integer array where each number occurs twice except for one of them, find the unique number.
Input: nums = [1, 3, 3, 2, 1]
Output: 2
nums contains at least one element.