Problem Reverse a singly linked list. Hint： A linked list can be reversed either iteratively or recursively. C…

欢迎fork and star：Nowcoder-Repository-github 109. Convert Sorted List to Binary Search Tree 题目 Given a singly li…

Write a program to find the nth super ugly number.Super ugly numbers are positive numbers whose all prime fact…

题目 给定一个字符串，请找出其中无重复字符的最长子字符串。 样例 例如，在”abcabcbb”中，其无重复字符的最长子字符串是”abc”，其长度为 3。 对于，”…

Problem Suppose you are at a party with n people (labeled from 0 to n - 1) and among them, there may exist one…

一、题目 给定两个整数，被除数 dividend 和除数 divisor。将两数相除，要求不使用乘法、除法和 mod 运算符。 返回被除数 dividend 除以除数 divisor 得到的商。 示例 1: 输入: di…

本文首发于我的个人博客：尾尾部落 题目描述 输入一个字符串,按字典序打印出该字符串中字符的所有排列。例如输入字符串abc,则打印出由字符a,b,c所能排列出来的所有字符串abc,acb,bac,bca,cab和cba。 …

  Given n, generate all structurally unique BST’s (binary search trees) that store v…

  Reverse a singly linked list. Example: Input: 1->2->3->4->5->NULL Output: 5->4->3-…

  Given a string, we can “shift” each of its letter to its successive letter, for example:&nb…

  Given an array nums containing n + 1 integers where each integer is between 1 and&n…

题目： The gray code is a binary numeral system where two successive values differ in only one bit. Given a non-n…