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Jul 22, 2024 · 3 min read · You are given a positive integer k. You are also given: a 2D integer array rowConditions of size n where rowConditions[i] = [above<sub>i</sub>, below<sub>i</sub>], and a 2D integer array colConditions of size m where colConditions[i] = [left<sub>i<...
Join discussionJul 17, 2024 · 1 min read · Given a binary tree, find the lowest common ancestor (LCA) of two given nodes in the tree.According to the definition of LCA on Wikipedia: "The lowest common ancestor is defined between two nodes p and q as the lowest node in T that has both p and q ...
Join discussionJul 12, 2024 · 3 min read · You are given a string s and two integers x and y. You can perform two types of operations any number of times. Remove substring "ab" and gain x points. For example, when removing "ab" from "cabxbae" it becomes "cxbae". Remove substring "ba" and ...
Join discussionJul 11, 2024 · 2 min read · You are given a string s that consists of lower case English letters and brackets. Reverse the strings in each pair of matching parentheses, starting from the innermost one. Your result should not contain any brackets. Let's traverse string s charac...
Join discussionJul 10, 2024 · 1 min read · The Leetcode file system keeps a log each time some user performs a change folder operation. The operations are described below: "../" : Move to the parent folder of the current folder. (If you are already in the main folder, remain in the same fold...
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