Showing items from data structures

Single Number

Single Number Given a non-empty array of integers nums, every element appears twice except for one. Find that single one. Example 1: Input: nums = [2,2,1] Output: 1 Example 2: Input: nums = [4,1,2,1,2] Output: 4 Example 3: Input: nums = [1] Output: 1 Using a HashSet (linear space complexity) We can …

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How to prepare for Google coding challenge

Coding challenges are technological developments designed to test your knowledge of algorithms and data structures. The company invites developers to participate in these events, solves coding problems, and wins top competition awards. Google runs three coding challenges each year. Preparing for a …

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