题目： Given an array S of n integers, are there elements a, b, c in …

题目地址：https://leetcode-cn.com/probl…题目描述：给定一个链表，返回链表开始入环的第一个节点。 如果链表无环，则返回 null。 为了表示给定链表中的环，我们使用整数 pos 来…

  Given a nested list of integers, implement an iterator to flatten it. Each element is either an integer…

题目： Given a binary tree, return the inorder traversal of its nodes’ values. For example: Given…

1. 题目 You are given two linked lists representing two non-negative numbers. The digits are stored in reverse o…

49. Group Anagrams 题目 Given an array of strings, group anagrams together. For example, given: ["eat", "tea", "…

欢迎fork and star：Nowcoder-Repository-github 30. Substring with Concatenation of All Words 题目 You are given a st…

1. Two Sum 题目 Given an array of integers, return indices of the two numbers such that they add up to a specifi…

  Determine whether an integer is a palindrome. An integer is a palindrome when it re…

  Given a function rand7 which generates a uniform random integer in the range 1 to 7, write a …

  Design a max stack that supports push, pop, top, peekMax and popMax.   push(x) — Push elemen…

1. 题目 Given a set of non-overlapping intervals, insert a new interval into the intervals (merge if necessary).…