Two Sum II - Input Array Is Sorted | Leetcode 167 | Sorting Problems and How to Approach | Python

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Two Sum II - Input Array Is Sorted | LeetCode 167 | Sorting Problems and How to Approach | Solution Walkthrough - Python

In this video, we solve "Two Sim II—Input Array is Sorted," a problem from Leetcode in which we explore a common technique called "two-pointer." We also look at common algorithmic considerations when facing certain keywords like "sorted" in a problem and what to consider when solving them in the future.

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▬ Contents of this video ▬▬▬▬▬▬▬▬▬▬
0:00 - Intro
0:12 - Problem Statment
1:01 - Conditions
2:35 - Notes on Sorting Algorithms
5:22 - Problem Example: Right to Left Pointer
17:29 - Problem Example 2: Left to Right Pointer
19:53 - Code
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The thing I don't understand is except when two pointers are at the edge of array (0, length-1), why can't we move the left pointer to left if sum>target to reduce the sum? vice versa for right pointer

siqi

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