sunshisonghit

摘要： Search Insert Position 问题： Given a sorted array and a target value, return the index if the target is found. If not, return the index where it would b 阅读全文

摘要： Populating Next Right Pointers in Each Node 问题： each next pointer to point to its next right node. If there is no next right node, the next pointer sh 阅读全文

摘要： Binary Tree Inorder Traversal 问题： Given a binary tree, return the inorder traversal of its nodes' values. Recursive solution is trivial, could you do 阅读全文

摘要： Binary Tree Preorder Traversal 问题： Given a binary tree, return the preorder traversal of its nodes' values. Recursive solution is trivial, could you d 阅读全文

摘要： Linked List Cycle 问题： Given a linked list, determine if it has a cycle in it. 思路： 快指针，慢指针方法 我的代码： public class Solution { public boolean hasCycle(List 阅读全文

摘要： Excel Sheet Column Number 问题： Given a column title as appear in an Excel sheet, return its corresponding column number. 思路： 进制转换方法 我的代码： public class 阅读全文

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