leetcode 解题思路

Given a list of stringswordsrepresenting an English Dictionary, find the longest word inwordsthat can be built one character at a time by other words inwords. If there is more than one possible a...

There arencities numbered from0ton-1andn-1roads such thatthere is only one way to travel between twodifferent cities (this network form a tree).Last year,The ministry of transportdecided to orient the roads in one direction because they are to...

You're given stringsJrepresenting the types of stones that are jewels, andSrepresenting the stones you have. Each character inSis a type of stone you have. You want to know how many of the sto...

Given an unsorted array of integers, find the length of the longest consecutive elements sequence. For example, Given [100, 4, 200, 1, 3, 2], The longest consecutive elements sequence is [1, 2, 3, 4]...