Design a data structure that supports the following two operations:void addWord(word)bool search(word)search(w…

1. 题目 Given an array and a value, remove all instances of that value in place and return the new length. Do no…

  Given a string of numbers and operators, return all possible results from computing all the different p…

  The Hamming distance between two integers is the number of positions at which the correspondi…

  Given a string representing an expression of fraction addition and subtraction, you need to return the …

  Given a binary tree, find the length of the longest path where each node in the path has the same value…

题目： Implement regular expression matching with support for '.' and '*'. '.' Matches any single …

题目： Given a string S and a string T, find the minimum window in S which will contain all the characters in T i…

41. First Missing Positive 题目 Given an unsorted integer array, find the first missing positive integer. For ex…

  Given a set of distinct integers, S, return all possible subsets. Note: Elements in a subset must …

1. 题目 Given two binary trees, write a function to check if they are equal or not. Two binary trees are conside…

  Divide two integers without using multiplication, division and mod operator. If it is overflow, return …