Given a digit string, return all possible letter combinations that the number could represent. A mapping of di…

  Given a list, rotate the list to the right by k places, where k is non-negative. Fo…

  Suppose you are at a party with n people (labeled from 0 to n - 1) and among t…

  You have n super washing machines on a line. Initially, each washing machine has some dresses…

题目： Given a collection of intervals, merge all overlapping intervals. For example, Given [1,3],[2,6],[8,1…

Given an array nums of n integers where n > 1, return an array output such that output[i] is equal to the p…

Given a 32-bit signed integer, reverse digits of an integer. Example 1:Input: 123Output: 321 Example 2:Input: …

原题地址: https://leetcode.com/problems/keyboard-row/description/ 大意：无聊的题目。。给一个list，list的每个元素是一个单词，看看这些单词是不是字母都在键盘…

注意事项 这个题目很容易搞明白, 但是需要注意的是, 这个题目的初始化比较麻烦. class Solution(object): def rob(self, nums): """ :type nums: List[int…

题目 Given a binary tree, find its maximum depth. The maximum depth is the number of nodes along the longest pat…

  Suppose a sorted array is rotated at some pivot unknown to you beforehand. (i.e., 0 1 2 4 5 6 7&nb…

  Given a positive integer n, find the least number of perfect square numbers (for example, 1, …