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Task Scheduler (M) 题目 You are given a char array representing tasks CPU need to do. It contains capital letters A to Z where each letter represents a 阅读全文
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Construct Binary Tree from Inorder and Postorder Traversal (M) 题目 Given inorder and postorder traversal of a tree, construct the binary tree. Note: Yo 阅读全文
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Add Digits (E) 题目 Given a non-negative integer num, repeatedly add all its digits until the result has only one digit. Example: Input: 38 Output: 2 Ex 阅读全文
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Find Minimum in Rotated Sorted Array II (H) 题目 Suppose an array sorted in ascending order is rotated at some pivot unknown to you beforehand. (i.e., [ 阅读全文
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All Paths From Source to Target (M) 题目 Given a directed, acyclic graph of N nodes. Find all possible paths from node 0 to node N-1, and return them in 阅读全文
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Single Number III (M) 题目 Given an array of numbers nums, in which exactly two elements appear only once and all the other elements appear exactly twic 阅读全文
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Edit Distance (H) 题目 Given two words word1 and word2, find the minimum number of operations required to convert word1 to word2. You have the following 阅读全文
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Binary Tree Zigzag Level Order Traversal (M) 题目 Given a binary tree, return the zigzag level order traversal of its nodes' values. (ie, from left to r 阅读全文
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Burst Balloons (H) 题目 Given n balloons, indexed from 0 to n-1. Each balloon is painted with a number on it represented by array nums. You are asked to 阅读全文
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Word Search (M) 题目 Given a 2D board and a word, find if the word exists in the grid. The word can be constructed from letters of sequentially adjacent 阅读全文