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Contains Duplicate in O(n) With a HashSet | LeetCode #217 (Easy)
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Last Updated: September 28, 2026
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Super helpful resources: nikoo28.github.io/all-my-links/ It is very important to learn about the utility functions and data ... Video contents: 00:00 - Read and understand the question 00:50 - Explain the brute force approach 02:21 - Explain the O(n) ... In this video, we'll break down the popular LeetCode problem ' In this video, I solve LeetCode – neetcode.io/ - A better way to prepare for Coding Interviews Twitter: twitter.com/neetcode1 Discord: ... The Best Place To Learn Anything Coding Related - bit.ly/3MFZLIZ Preparing For Your Coding Interviews? Use These ... Tonight I'm tackling LeetCode 217: In this video, we will solve LeetCode 217 – This video has the Problem Statement, Solution Walk-through and Code for the Leetcode Question 217. Problem: Given an integer array nums, return true if any value appears at least twice in the array, and return false if every element ... In this video, we solve LeetCode 217 -