code#swan

Populating Next Right Pointers in Each Node

摘要： Given a binary tree struct TreeLinkNode { TreeLinkNode *left; TreeLinkNode *right; TreeLinkNode *next; }Populate each next pointe... 阅读全文

posted @ 2014-12-03 20:30 code#swan 阅读(115) 评论(0) 推荐(0)

Populating Next Right Pointers in Each Node II

摘要： Follow up for problem "Populating Next Right Pointers in Each Node".What if the given tree could be any binary tree? Would your previous solution stil... 阅读全文

posted @ 2014-12-03 20:28 code#swan 阅读(128) 评论(0) 推荐(0)

Path Sum II

摘要： Given a binary tree and a sum, find all root-to-leaf paths where each path's sum equals the given sum.For example:Given the below binary tree andsum =... 阅读全文

posted @ 2014-12-03 20:14 code#swan 阅读(93) 评论(0) 推荐(0)

Distinct Subsequences

摘要： Given a stringSand a stringT, count the number of distinct subsequences ofTinS.A subsequence of a string is a new string which is formed from the orig... 阅读全文

posted @ 2014-12-03 20:13 code#swan 阅读(103) 评论(0) 推荐(0)

Pascal's Triangle II

摘要： Given an indexk, return thekthrow of the Pascal's triangle.For example, givenk= 3,Return[1,3,3,1].Note:Could you optimize your algorithm to use onlyO(... 阅读全文

posted @ 2014-12-03 20:10 code#swan 阅读(116) 评论(0) 推荐(0)

Triangle

摘要： Given a triangle, find the minimum path sum from top to bottom. Each step you may move to adjacent numbers on the row below.For example, given the fol... 阅读全文

posted @ 2014-12-03 20:09 code#swan 阅读(87) 评论(0) 推荐(0)

Best Time to Buy and Sell Stock

摘要： Say you have an array for which theithelement is the price of a given stock on dayi.If you were only permitted to complete at most one transaction (ie... 阅读全文

posted @ 2014-12-03 20:04 code#swan 阅读(85) 评论(0) 推荐(0)

Best Time to Buy and Sell Stock II

摘要： Say you have an array for which theithelement is the price of a given stock on dayi.Design an algorithm to find the maximum profit. You may complete a... 阅读全文

posted @ 2014-12-03 20:03 code#swan 阅读(79) 评论(0) 推荐(0)

Best Time to Buy and Sell Stock III