1. 题目 Implement atoi to convert a string to an integer. Hint: Carefully consider all possible input cases. If …

  Convert a non-negative integer to its english words representation. Given input is guaranteed to be les…

Given a matrix consists of 0 and 1, find the distance of the nearest 0 for each cell. The distance between two…

Count Primes Description: Count the number of prime numbers less than a non-negative number, n. 埃拉托斯特尼筛法 Sieve…

  Merge two sorted linked lists and return it as a new list. The new list should be made by splicing toge…

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

  Say you have an array for which the ith element is the price of a given stock on day i. …

题目 There are N gas stations along a circular route, where the amount of gas at station i is gas[i]. You have a…

  Given an integer array nums, find the contiguous subarray within an array (containing at least one…

  We are stacking blocks to form a pyramid. Each block has a color which is a one letter string, like `&#…

Copy List with Random Pointer A linked list is given such that each node contains an additional random pointer…

1. 题目 Implement wildcard pattern matching with support for ‘?’ and ‘*’. ‘?’…