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RSS订阅原创 LeetCode练习10：Regular Expression Matching
题目 Given an input string (s) and a pattern (p), implement regular expression matching with support for '.' and '*'. ‘.’ Matches any single character. ‘*’ Matches zero or more of the preceding ...
2018-04-23 13:15:54
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原创 LeetCode练习8：String to Integer (atoi)
题目 Implement atoi which converts a string to an integer. The function first discards as many whitespace characters as necessary until the first non-whitespace character is found. Then, starting from...
2018-04-23 10:56:36
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原创 LeetCode练习6：ZigZag Conversion
题目 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) Example Input: s =...
2018-04-23 10:32:13
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原创 LeetCode练习5：Longest Palindromic Substring
题目 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...
2018-04-22 22:39:15
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原创 Python 3 编程BUG总结【不断更新】
问题1 SyntaxError: invalid character in identifier 可能原因： 存在中文状态下的括号（），而不是() 代码的末尾有空格
2018-04-18 19:00:30
265
翻译 LeetCode练习4：Median of Two Sorted Arrays
题目 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: nums1 = [...
2018-04-16 19:38:26
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原创 LeetCode练习3：Longest Substring Without Repeating Characters
题目 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 i...
2018-04-14 10:24:48
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原创 LeetCode练习2：Add Two Numbers
题目 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 retu...
2018-04-13 22:26:10
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原创 LeetCode练习13：Roman to Integer
题目 Given a roman numeral, convert it to an integer. Input is guaranteed to be within the range from 1 to 3999. 分析 题目的输入为：一个1-3999范围内的罗马数字字符串 输出为：对应的整数 本题目只需要注意一下罗马数字的命名规则即可，首先罗马数字的基本字符包括： ...
2018-04-13 15:30:30
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原创 LeetCode练习9：Palindrome Number
题目 Determine whether an integer is a palindrome. Do this without extra space. Some Hints: Could negative integers be palindromes? (ie, -1). If you are thinking of converting the integer to...
2018-04-12 16:26:43
135
原创 LeetCode练习7：Reverse Integer
题目 Given a 32-bit signed integer, reverse digits of an integer. Example: Input: 123，Output: 321 Input: -123，Output: -321 Input: 120，Output: 21 分析 题目中的输入为：一个32位的有符号整数xxx. 输出为：倒序的整数x^x...
2018-04-11 13:40:50
187
原创 LeetCode练习1：Two Sum
题目 Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume each input would have exactly one solution, and you may not use the same e...
2018-04-10 19:42:05
115
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