Two Sum - LeetCode 1 - Python

Published: 23 May 2024
on channel: Gordon Zhu

4,351

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Most teachers introduce solutions as fully-formed recipes. But in doing so, they totally miss how solutions are DISCOVERED. In painstaking detail, I go through this crucial missing piece and demonstrate how to methodically attack problems from every possible angle.

My teaching: https://watchandcode.com
Two sum problem: https://leetcode.com/problems/two-sum/

My video for Two Sum II (the sequel to this problem):
• Two Sum II - LeetCode 167 - Python

0:00 Two sum problem statement
0:19 Initial thought process
1:12 Brute-force implementation & analysis
3:00 Optimizing our initial approach
7:25 Implementing a faster algorithm
7:47 One-pass?
9:52 Awkward code
12:00 The most important part

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