Given a set of words (without duplicates), find all word squares you can build from them…

  Given a directed, acyclic graph of N nodes.  Find all possible paths from node 0&nb…

题目描述 Given a pattern and a string str, find if str follows the same pattern. Here follow means a full match, s…

  Given a positive integer n, generate a square matrix filled with elements from 1 to n2 i…

  You are playing the following Nim Game with your friend: There is a heap of stones on the table, each t…

  Given an unsorted array of integers, find the length of longest increasing subsequence. Example: Input:…

  Given a string which contains only lowercase letters, remove duplicate letters so that every letter app…

题目： Given a collection of integers that might contain duplicates, S, return all possible subsets. Note: E…

  Reverse bits of a given 32 bits unsigned integer. For example, given input 43261596 (represented in bin…

  Design a Tic-tac-toe game that is played between two players on a n x n grid. You may assume the follow…

  Given a non-empty string, encode the string such that its encoded length is the shortest. The encoding …

  A sequence of numbers is called arithmetic if it consists of at least three elements and if the differe…