Given a matrix of m x n elements (m rows, n columns), return all elements o…

Given a set of non-overlapping intervals, insert a new interval into the intervals (merge if necessa…

Given a m x n matrix, if an element is 0, set its entire row and column to 0. Do it in pla…

题目： Write a function to find the longest common prefix string amongst an array of strings. 求一系列字符串的公共字符串前缀。 题目…

Given an integer n, generate a square matrix filled with elements from 1 to n2 in spiral order.…

Given n pairs of parentheses, write a function to generate all combinations of well-formed parenthes…

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

Given two words word1 and word2, find the minimum number of steps required to convert word…

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

There are N gas stations along a circular route, where the amount of gas at station i is&n…

题目： Given a linked list, remove the nth node from the end of list and return its head. For example, …

Given a triangle, find the minimum path sum from top to bottom. Each step you may move to adjacent numbers on …