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摘要：Suppose a sorted array is rotated at some pivot unknown to you beforehand.(i.e.,0 1 2 4 5 6 7might become4 5 6 7 0 1 2).You are given a target value t... 阅读全文

摘要：source:https://oj.leetcode.com/problems/find-minimum-in-rotated-sorted-array/Suppose a sorted array is rotated at some pivot unknown to you beforehand... 阅读全文

摘要：Givenn, how many structurally uniqueBST's(binary search trees) that store values 1...n?For example,Givenn= 3, there are a total of 5 unique BST's. 1... 阅读全文

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