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摘要： Source:https://oj.leetcode.com/problems/longest-common-prefix/Write a function to find the longest common prefix string amongst an array of strings.Hi... 阅读全文

摘要： Given a binary tree and a sum, determine if the tree has a root-to-leaf path such that adding up all the values along the path equals the given sum.Fo... 阅读全文

摘要： 原题地址：https://oj.leetcode.com/problems/distinct-subsequences/题意：Given a stringSand a stringT, count the number of distinct subsequences ofTinS.A subseq... 阅读全文

摘要： 原题地址：https://oj.leetcode.com/problems/best-time-to-buy-and-sell-stock-iii/题意：Say you have an array for which theithelement is the price of a given sto... 阅读全文

摘要： (坦率的说,这道题目感动了我, 让我这个编程新手体验到了逻辑的美)原题地址：https://oj.leetcode.com/problems/populating-next-right-pointers-in-each-node/题意： 1 / \ 2 ... 阅读全文

摘要： Given a string containing just the characters'('and')', find the length of the longest valid (well-formed) parentheses substring.For"(()", the longest... 阅读全文

摘要： https://oj.leetcode.com/problems/valid-parentheses/Given a string containing just the characters '(', ')', '{', '}', '[' and ']', determine if the inp... 阅读全文

摘要： 原题地址：https://oj.leetcode.com/problems/merge-k-sorted-lists/题意：Mergeksorted linked lists and return it as one sorted list. Analyze and describe its com... 阅读全文

摘要： 原题地址：https://oj.leetcode.com/problems/largest-rectangle-in-histogram/题意：Givennnon-negative integers representing the histogram's bar height where the ... 阅读全文

摘要： The count-and-say sequence is the sequence of integers beginning as follows:1, 11, 21, 1211, 111221, ...1is read off as"one 1"or11.11is read off as"tw... 阅读全文