随笔分类 - LeetCode
摘要：题目要求：Search in Rotated Sorted ArraySuppose a sorted array is rotated at some pivot unknown to you beforehand.(i.e.,0 1 2 4 5 6 7might become4 5 6 7 0 ...
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摘要：题目描述：Longest Valid ParenthesesGiven a string containing just the characters'('and')', find the length of the longest valid (well-formed) parentheses s...
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摘要：题目要求：Substring with Concatenation of All WordsYou are given a string,S, and a list of words,L, that are all of the same length. Find all starting indi...
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摘要：题目要求：Divide Two IntegersDivide two integers without using multiplication, division and mod operator.If it is overflow, return MAX_INT.分析：不能用乘、除和取余，则只能...
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摘要：题目要求：Implement strStr()Implement strStr().Returns the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack.Jav...
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摘要：题目要求：Remove ElementGiven an array and a value, remove all instances of that value in place and return the new length.The order of elements can be chan...
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摘要：题目描述：Remove Duplicates from Sorted ArrayGiven a sorted array, remove the duplicates in place such that each element appear onlyonceand return the new ...
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摘要：题目描述：Reverse Nodes in k-GroupGiven a linked list, reverse the nodes of a linked listkat a time and return its modified list.If the number of nodes is ...
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摘要：题目描述：Swap Nodes in PairsGiven a linked list, swap every two adjacent nodes and return its head.For example,Given1->2->3->4, you should return the list...
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摘要：题目要求：Merge k Sorted ListsMergeksorted linked lists and return it as one sorted list. Analyze and describe its complexity.AnalysisThe simplest solution...
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摘要：题目描述：Generate ParenthesesGivennpairs of parentheses, write a function to generate all combinations of well-formed parentheses.For example, givenn= 3, ...
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摘要：题目描述：Valid ParenthesesGiven a string containing just the characters'(',')','{','}','['and']', determine if the input string is valid.The brackets must...
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摘要：题目描述：Remove Nth Node From End of ListGiven a linked list, remove thenthnode from the end of list and return its head.For example, Given linked list:...
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摘要：题目描述：4SumGiven an arraySofnintegers, are there elementsa,b,c, anddinSsuch thata+b+c+d= target? Find all unique quadruplets in the array which gives th...
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摘要：题目描述：Letter Combinations of a Phone NumberGiven a digit string, return all possible letter combinations that the number could represent.A mapping of d...
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摘要：题目描述：3Sum ClosestGiven an arraySofnintegers, find three integers inSsuch that the sum is closest to a given number, target. Return the sum of the thre...
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摘要：题目描述：3SumGiven an arraySofnintegers, are there elementsa,b,cinSsuch thata+b+c= 0? Find all unique triplets in the array which gives the sum of zero.No...
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摘要：题目描述：Longest Common PrefixWrite a function to find the longest common prefix string amongst an array of strings.代码如下：class Solution {public: string...
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摘要：题目描述：Roman to IntegerGiven a roman numeral, convert it to an integer.Input is guaranteed to be within the range from 1 to 3999.分析：① 输入为VII，则数字为V + I +...
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摘要：题目描述：Integer to RomanGiven an integer, convert it to a roman numeral.Input is guaranteed to be within the range from 1 to 3999.罗马数字的计数方法：基本字符IVXLCDM相应...
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