Single Number 2- LeetCode 137 | Coding problem | Interview Question | Google, Facebook Interview
Problem Statement:
Given a non-empty array of integers, every element appears three times except for one, which appears exactly once. Find that single one.
Note:
Your algorithm should have a linear runtime complexity. Could you implement it without using extra memory?
Example 1:
Input: [2,2,3,2]
Output: 3
Example 2:
Input: [0,1,0,1,0,1,99]
Output: 99
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