In this problem, a tree is an undirected graph that is connected and has no cycles. The given…

简洁容易理解 class Solution(object): def change(self, amount, coins): """ :type amount: int :type coins: List[int] :…

题目 Given n points in the plane that are all pairwise distinct, a “boomerang” is a tuple of points …

  Given a sorted array of integers, find the starting and ending position of a given target value. Your a…

  Given a string array words, find the maximum value of length(word[i]) * length(word[j]) …

  Given a list of directory info including directory path, and all the files with contents in this direct…

题目： Given a collection of candidate numbers (C) and a target number (T), find all unique combinations in …

Single Number I 最新思路解法请访问：https://yanjia.me/zh/2018/11/… Given an array of integers, every element appea…

最近好久没有更新博客了，因为博主最近忙于学校的一些学业工作。大三下学期嘛，还是挺忙的-，-。 下面我们来看一下这道题： Given a string, find the length of the longest sub…

这是悦乐书的第197次更新，第204篇原创 01 看题和准备 今天介绍的是LeetCode算法题中Easy级别的第60题（顺位题号是235）。编写一个函数来删除单链表中的节点（尾部除外），只允许访问该节点。例如： 鉴于链…

  You are given a list of non-negative integers, a1, a2, …, an, and a target, S. Now you have 2 sym…

Convert Sorted List to Binary Search Tree Given a singly linked list where elements are sorted in ascending or…