![LeetCode 1640. [easy] Check Array Formation Through Concatenation](https://i.ytimg.com/vi/-zGX4yq9EgE/mqdefault.jpg)
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Last Updated: September 22, 2026
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This video is a solution to Leet code 1640, neetcode.io/ - A better way to prepare for Coding Interviews Discord: discord.gg/ddjKRXPqtk Twitter: ... January Daily Challenge Problem - 1 is here guys! 1) 0:00 Explaining the problem out loud 2) 3:00 Algorithm walkthrough 3) 8:00 Coding it up 4) 12:40 Time complexity TC :O(n) SC ... Weird solution to this problem.
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