sunshisonghit

摘要： Unique Binary Search Trees 问题： Given n, how many structurally unique BST's (binary search trees) that store values 1...n? For example,Given n = 3, the 阅读全文

摘要： Best Time to Buy and Sell Stock II 问题： Say you have an array for which the ith element is the price of a given stock on day i. Design an algorithm to 阅读全文

摘要： Same Tree 问题： Given two binary trees, write a function to check if they are equal or not. Two binary trees are considered equal if they are structural 阅读全文

摘要： Maximum Depth of Binary Tree 问题： Given a binary tree, find its maximum depth. The maximum depth is the number of nodes along the longest path from the 阅读全文

摘要： Single Number 问题： Given an array of integers, every element appears twice except for one. Find that single one. 思路： 异或 我的方法： public class Solution { p 阅读全文