Given a string and a string dictionary, find the longest string in the dictionary that can be formed by…

  Given a list of positive integers, the adjacent integers will perform the float division. For exam…

题目描述 Given a binary tree, return all root-to-leaf paths. For example, given the following binary tree: 1 / \ 2…

Reorder List Given a singly linked list L: L0→L1→…→Ln-1→Ln, reorder it to: L0→Ln→L1→Ln-1→L2→Ln-2→… You must do…

题目： A message containing letters from A-Z is being encoded to numbers using the following mapping: '…

题目说明 Write an efficient algorithm that searches for a value in an m x n matrix. This matrix has the following …

1. 题目 Follow up for “Unique Paths”: Now consider if some obstacles are added to the grids. How man…

  Given an array nums and a target value k, find the maximum length of a subarray that sums to k. If ther…

  Given n processes, each process has a unique PID (process id) and its PPID (pa…

题目描述 Validate if a given string is numeric. Some examples: "0" => true " 0.1 " => true "abc" => false…

79. Word Search 题目 Given a 2D board and a word, find if the word exists in the grid. The word can be construct…

  You are given an integer array sorted in ascending order (may contain duplicates), you need to split th…