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… Read More »LeetCode: 36-Valid Sudoku 解題紀錄

題目

You are given an m x n matrix maze (0-indexed) with empty cells (represented as '.') and walls (represented as '+'). You are also given the entrance of the maze, where entrance = [entrancerow, entrancecol] denotes the row and column of the cell you are initially standing at.

… Read More »LeetCode: 223-Rectangle Area 解題紀錄

… Read More »LeetCode: 94-Binary Tree Inorder Traversal 解題紀錄

題目

You are given an integer array nums and an array queries where queries[i] = [vali, indexi].

題目

Given a list paths of directory info, including the directory path, and all the files with contents in this directory, return all the duplicate files in the file system in terms of their paths. You may return the answer in any order.

題目

An integer array original is transformed into a doubled array changed by appending twice the value of every element in original, and then randomly shuffling the resulting array.