Li_Yolanda-优快云博客

原创 LeetCode-273. Integer to English Words

Convert a non-negative integer to its english words representation. Given input is guaranteed to be less than 231 - 1.For example,123 -> "One Hundred Twenty Three"12345 -> "Twelve Thousand Thre

2017-04-16 21:44:07 334

原创 LeetCode-419. Battleships in a Board

Given an 2D board, count how many battleships are in it. The battleships are represented with 'X's, empty slots are represented with '.'s. You may assume the following rules:You receive a valid

2017-04-16 20:54:53 346

原创 LeetCode-138. Copy List with Random Pointer

A linked list is given such that each node contains an additional random pointer which could point to any node in the list or null.Return a deep copy of the list.Hash Table/** * Definitio

2017-04-16 20:41:13 326

原创 LeetCode-206. Reverse Linked List

206. Reverse Linked ListReverse a singly linked list.用循环的方式:/** * Definition for singly-linked list. * struct ListNode { * int val; * ListNode *next; * ListNode(int x) : val

2017-04-14 15:04:29 320

原创 LeetCode-94(Binary Tree Inorder Traversal)

Given a binary tree, return the inorder traversal of its nodes' values.For example:Given binary tree [1,null,2,3], 1 \ 2 / 3return [1,3,2].Note: Recursive solu

2017-04-03 16:09:46 260

原创 LeetCode-10(回文检测)

Determine whether an integer is a palindrome. Do this without extra space.class Solution {public: bool isPalindrome(int x) { if(x<0 || (x!=0 && x%10==0)) return false; //个位是0肯定不是回

2017-04-03 15:42:11 405

原创 LeetCode-8(String to Integer (atoi))

Implement atoi to convert a string to an integer.Hint: Carefully consider all possible input cases. If you want a challenge, please do not see below and ask yourself what are the possible input ca

2017-04-03 15:30:02 303

原创 LeetCode-7(Reverse Integer)

Reverse digits of an integer.Example1: x = 123, return 321Example2: x = -123, return -321click to show spoilers.Note:The input is assumed to be a 32-bit signed integer. Your function s

2017-04-03 11:38:49 464

原创 LeetCode-6(ZigZag Conversion)

The string "PAYPALISHIRING" is written in a zigzag pattern on a given number of rows like this: (you may want to display this pattern in a fixed font for better legibility)P A H NA P L S I

2017-04-03 10:47:12 389

原创 LeetCode-5*(回文)

Given a string s, find the longest palindromic substring in s. You may assume that the maximum length of s is 1000.Example:Input: "babad"Output: "bab"Note: "aba" is also a valid answer.

2017-04-03 10:02:56 324

原创 LeetCode-4*

There are two sorted arrays nums1 and nums2 of size m and n respectively.Find the median of the two sorted arrays. The overall run time complexity should be O(log (m+n)).Example 1:nums1 =

2017-04-03 00:30:40 313

原创 LeetCode-3*

Given a string, find the length of the longest substring without repeating characters.Examples:Given "abcabcbb", the answer is "abc", which the length is 3.Given "bbbbb", the answer is "

2017-04-02 11:58:33 289

You are given two non-empty linked lists representing two non-negative integers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the two numbers and return i

2017-04-02 09:27:08 410

原创 leetcode-1

Given an array of integers, return indices of the two numbers such that they add up to a specific target.You may assume that each input would have exactly one solution, and you may not use the sam

2017-04-02 08:55:15 289

原创 leetcode-24

Given a linked list, swap every two adjacent nodes and return its head.For example,Given 1->2->3->4, you should return the list as 2->1->4->3.Your algorithm should use only constant space. Y

2017-04-02 08:46:19 283

原创记阿里电面一试-研发类c++

找到内推投了阿里的简历，过了素质测评和在线测试之后第一次电面经历。

2017-03-30 21:23:17 538

Li_Yolanda的博客