题目： A peak element is an element that is greater than its neighbors. Given an input array nums, where nums[i] …

70.爬楼梯 假设你正在爬楼梯。需要 阶你才能到达楼顶。 每次你可以爬 或 个台阶。你有多少种不同的方法可以爬到楼顶呢？ 注意：给定 是一个正整数。 示例 1： 输入： 输出： 解释： 有两种方法可以爬到楼顶。 阶 + …

Validate if a given string is numeric. Some examples: “0” => true ” 0.1 ” => tru…

Given an unsorted array of integers, find the length of the longest consecutive elements sequence. For example…

问题描述 Given two strings A and B, find the minimum number of times A has to be repeated such that B is a substri…

欢迎fork and star：Nowcoder-Repository-github 29. Divide Two Integers 题目 Divide two integers without using multip…

欢迎fork and star：Nowcoder-Repository-github 101. Symmetric Tree 题目 Given a binary tree, check whether it is a m…

  Remove all elements from a linked list of integers that have value val. Example Given: 1 –> 2 …

题目描述 Given an array of integers, find out whether there are two distinct indices i and j in the array such tha…

Given a linked list, reverse the nodes of a linked list k at a time and return its modified list. If…

题意：给你一个数组vector，给你一个数W，问能否将vector数组均分，对每份来说数量都是W，而且每份都是连续的数字。 解题思路：先对vector做个排序，然后使用一个map（其实可以使用set的）存储下标数，遍历m…

欢迎fork and star：Nowcoder-Repository-github 13. Roman to Integer 题目 Given a roman numeral, convert it to an int…