Given an array of integers nums sorted in ascending order, find the starting and ending position of a given ta…

  Given an array of strings, group anagrams together. Example: Input: ["eat", "tea", "tan", "ate", "nat",…

  Given an array of numbers, verify whether it is the correct preorder traversal sequence of a binary sea…

  Find all possible combinations of k numbers that add up to a number n, given that only numbers from 1 t…

On a broken calculator that has a number showing on its display, we can perform two operations:Double: Multipl…

  Given a robot cleaner in a room modeled as a grid. Each cell in the grid can be empty or blocked. The r…

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

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

  Given an m * n matrix M initialized with all 0’s and several update operations. Op…

欢迎fork and star：Nowcoder-Repository-github 47. Permutations II 题目 Given a collection of numbers that might con…

  On a 2×3 board, there are 5 tiles represented by the integers 1 through 5, and an empty squar…

题目： Given a number represented as an array of digits, plus one to the number. 思路： 数组的遍历需要从右向左进行，然后结果存在临时数组中为从左…