120. Triangle 题目 Given a triangle, find the minimum path sum from top to bottom. Each step you may move to adj…

  Given a 2D board and a word, find if the word exists in the grid. The word can be constructed from lett…

题目描述 Sort a linked list using insertion sort. 代码 public ListNode insertionSortList(ListNode head) { if (head =…

In a country popular for train travel, you have planned some train travelling one year in advance. The days of…

Paint Fence There is a fence with n posts, each post can be painted with one of the k colors. You have to pain…

题目： Determine whether an integer is a palindrome. Do this without extra space. click to show spoilers. Some hi…

题目 Given an array of integers, return indices of the two numbers such that they add up to a specific target. Y…

存在重复 给定一个整数数组，判断是否存在重复元素。 如果任何值在数组中出现至少两次，函数应该返回 true。如果每个元素都不相同，则返回 false。 这个算是比较容易的。（判断的方法依据就是：我不用百度会做Ƕ…

1、题目描述 Suppose an array sorted in ascending order is rotated at some pivot unknown to you beforehand. (i.e., […

Convert a binary search tree to doubly linked list with in-order traversal. Example Given a binary search tree…

欢迎fork and star：Nowcoder-Repository-github 137. Single Number II 题目 Given an array of integers, every element …

  Given a m x n matrix, if an element is 0, set its entire row and column to 0. Do it…