H_Arbiter的专栏

Median of Two Sorted ArraysMar 28 '11 There are two sorted arrays A and B of size m and n respectively. Find the median of the two sorted arrays. The overall run time complexity should be O(log

Add Two NumbersNov 1 '11 You are given two linked lists representing two non-negative numbers. The digits are stored in reverse order and each of their nodes contain a single digit. Add the two

Longest Substring Without Repeating CharactersMay 16 '11 Given a string, find the length of the longest substring without repeating characters. For example, the longest substring without repeat

Two SumMar 14 '11 Given an array of integers, find two numbers such that they add up to a specific target number. The function twoSum should return indices of the two numbers such that they

String to Integer (atoi)Dec 27 '11 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 a

Reverse IntegerDec 26 '11 Reverse digits of an integer. Example1: x = 123, return 321 Example2: x = -123, return -321 Have you thought about this? Here are some good questions to ask

ZigZag ConversionDec 6 '11 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 leg

Longest Palindromic SubstringNov 11 '11 Given a string S, find the longest palindromic substring in S. You may assume that the maximum length of S is 1000, and there exists one unique longest

Palindrome NumberJan 4 '124196 / 10440 Determine whether an integer is a palindrome. Do this without extra space. Some hints: Could negative integers be palindromes? (ie, -1) If you