摘要：题目：Given a linked list, return the node where the cycle begins. If there is no cycle, returnnull.Follow up:Can you solve it without using extra space?...
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摘要：题目：Given a linked list, determine if it has a cycle in it.Follow up:Can you solve it without using extra space?代码：用hashmap版/** * Definition for singly...
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摘要：题目：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 co...
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摘要：题目：Given a linked list, reverse the nodes of a linked listkat a time and return its modified list.If the number of nodes is not a multiple ofkthen lef...
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摘要：题目：Given a linked list, swap every two adjacent nodes and return its head.For example,Given1->2->3->4, you should return the list as2->1->4->3.Your al...
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摘要：题目：Given a linked list, remove thenthnode from the end of list and return its head.For example, Given linked list: 1->2->3->4->5, and n = 2. After...
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摘要：题目：Given a list, rotate the list to the right bykplaces, wherekis non-negative.For example:Given1->2->3->4->5->NULLandk=2,return4->5->1->2->3->NULL.代码...
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摘要：题目：Given a sorted linked list, delete all nodes that have duplicate numbers, leaving onlydistinctnumbers from the original list.For example,Given1->2-...
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摘要：题目：Given a linked list and a valuex, partition it such that all nodes less thanxcome before nodes greater than or equal tox.You should preserve the or...
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摘要：题目：Reverse a linked list from positionmton. Do it in-place and in one-pass.For example:Given1->2->3->4->5->NULL,m= 2 andn= 4,return1->4->3->2->5->NULL...
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摘要：题目：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 sing...
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摘要：题目：Given an array of integers, every element appearsthreetimes except for one. Find that single one.Note:Your algorithm should have a linear runtime c...
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摘要：题目：Given an array of integers, every element appearstwiceexcept for one. Find that single one.Note:Your algorithm should have a linear runtime complex...
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摘要：题目：There areNchildren standing in a line. Each child is assigned a rating value.You are giving candies to these children subjected to the following re...
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摘要：题目：There areNgas stations along a circular route, where the amount of gas at stationiisgas[i].You have a car with an unlimited gas tank and it costsco...
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摘要：题目：Given amxnmatrix, if an element is 0, set its entire row and column to 0. Do it in place.click to show follow up.Follow up:Did you use extra space?...
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摘要：题目：The gray code is a binary numeral system where two successive values differ in only one bit.Given a non-negative integernrepresenting the total num...
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摘要：题目：You are climbing a stair case. It takesnsteps to reach to the top.Each time you can either climb 1 or 2 steps. In how many distinct ways can you cl...
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摘要：题目：Given a non-negative number represented as an array of digits, plus one to the number.The digits are stored such that the most significant digit is...
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摘要：题目：You are given annxn2D matrix representing an image.Rotate the image by 90 degrees (clockwise).Follow up:Could you do this in-place?代码：class Solutio...
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摘要：题目：Givennnon-negative integers representing an elevation map where the width of each bar is 1, compute how much water it is able to trap after raining...
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摘要：题目：Determine if a Sudoku is valid, according to:Sudoku Puzzles - The Rules.The Sudoku board could be partially filled, where empty cells are filled wi...
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摘要：题目：The set[1,2,3,…,n]contains a total ofn! unique permutations.By listing and labeling all of the permutations in order,We get the following sequence ...
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摘要：题目：Implement next permutation, which rearranges numbers into the lexicographically next greater permutation of numbers.If such arrangement is not poss...
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摘要：题目：Given an array and a value, remove all instances of that value in place and return the new length.The order of elements can be changed. It doesn't ...
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摘要：题目：Given an arraySofnintegers, are there elementsa,b,c, anddinSsuch thata+b+c+d= target? Find all unique quadruplets in the array which gives the sum ...
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摘要：题目：Given an arraySofnintegers, find three integers inSsuch that the sum is closest to a given number, target. Return the sum of the three integers. Yo...
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摘要：题目：Given an arraySofnintegers, are there elementsa,b,cinSsuch thata+b+c= 0? Find all unique triplets in the array which gives the sum of zero.Note:Ele...
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摘要：题目：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...
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摘要：题目：Given an unsorted array of integers, find the length of the longest consecutive elements sequence.For example,Given[100, 4, 200, 1, 3, 2],The longe...
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摘要：题目：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 ...
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摘要：题目：Suppose 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 1 2).You are given a target valu...
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摘要：题目：Follow up for "Remove Duplicates":What if duplicates are allowed at mosttwice?For example,Given sorted array A =[1,1,1,2,2,3],Your function should ...
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摘要：题目：https://leetcode.com/problems/remove-duplicates-from-sorted-array/Given a sorted array, remove the duplicates in place such that each element appea...
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