![LeetCode 437. Path Sum III [Solution + Code Explained ]](https://i.ytimg.com/vi/x87RihNvRaY/mqdefault.jpg)
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Last Updated: September 27, 2026
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CORRECTION: TC is O(n^2), since from every node we are triggering a new pathSum_a(), which traverses tree rooted at that ... Please note time complexity is O(n^2). One of the most frequently asked coding interview questions on Arrays in companies ... neetcode.io/ - A better way to prepare for Coding Interviews Discord: discord.gg/ddjKRXPqtk Twitter: ... Given the root of a binary tree and an integer targetSum, return the number of Source code: github.com/HUANGXUANKUN/
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