题目链接：3SumGiven an array S of n integers, are there elements a, b, c in S such that a + b + c = 0? Find all unique triplets in the array which gives the sum of zero.Not...
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题目链接：Longest Common PrefixWrite a function to find the longest common prefix string amongst an array of strings.这道题的要求是在字符串数组中找到最长公共前缀。思路比较简单，就是两个字符串逐个比较，找最长公共子串。这里采用将...
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题目链接：Roman to IntegerGiven a roman numeral, convert it to an integer.Input is guaranteed to be within the range from 1 to 3999.这道题的要求是将罗马数字转化成整数，其中输入数据范围是1到3999。罗马数字是最...
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题目链接：Integer to RomanGiven an integer, convert it to a roman numeral.Input is guaranteed to be within the range from 1 to 3999.这道题的要求是将整数转化成罗马数字，其中输入数据范围是1到3999。罗马数字是最...
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题目链接：Container With Most WaterGiven n non-negative integers a1, a2, …, an, where each represents a point at coordinate (i, ai). n vertical lines are drawn such that th...
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题目链接：Regular Expression MatchingImplement regular expression matching with support for ‘.’ and ‘*’.'.' Matches any single character. '*' Matches zero or more of the pr...
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题目链接：Palindrome NumberDetermine whether an integer is a palindrome. Do this without extra space.Some hints:Could negative integers be palindromes? (ie, -1)If you are t...
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题目链接：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...
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题目链接：Reverse IntegerReverse digits of an integer.Example1: x = 123, return 321Example2: x = -123, return -321Have you thought about this?Here are some good questions t...
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题目链接：ZigZag ConversionThe 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 ...
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