Day 16 of My DSA Journey 🚶‍♀️

The Problem Given a non-empty array of integers,every element appears twice except one.Find that single element. Example 1 Input: [2, 2, 1] Output: 1 Example 2 Input: [4, 1, 2, 1, 2] Output: 4 Only one number appears once.All others appear exac...