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原创 Leetcode:Best Time to Buy and Sell Stock

Best Time to Buy and Sell Stock Say you have an array for which the ith element is the price of a given stock on day i. If you were only permitted to complete at most one transaction

2014-12-11 19:27:13 217

原创 Leetcode:Same Tree

Given two binary trees, write a function to check if they are equal or not. Two binary trees are considered equal if they are structurally identical and the nodes have the same value.

2014-10-29 11:07:20 226

原创 Leetcode:Maximum Depth of Binary Tree

Maximum Depth of Binary Tree Given a binary tree, find its maximum depth. The maximum depth is the number of nodes along the longest path from the root node down to the farthest leaf

2014-10-28 09:58:30 303

原创 Leetcode:Single Number

Given an array of integers, every element appears twice except for one. Find that single one. Note: Your algorithm should have a linear runtime complexity. Could you implement it without using ext

2014-10-23 11:00:40 308

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