java list remove duplicates

/*** Definition for singly-linked list. * public class ListNode {* int val; * ListNode Next; * ListNode (int X) {val = x;}}*/ Public classSolution { PublicListNode deleteduplicates (ListNode head) {MapNewHashmap(); if(head==NULL) return NULL; ListNode Temp=Head; ListNode Tail=NULL; while(temp!=NULL) { if(Mp.containskey (temp.val)) {if(tail!=NULL) Tail.next=Temp.next; ElseHead=Temp.next; } Else{mp.put (Temp.val,

/** * Definition for singly-linked list. * struct ListNode {* int val; * ListNode *next; * ListNode (int x): Val (x), Next (NULL) {} *}; */class Solution {//on_my_ownpublic:listnode* deleteduplicates (listnode* head) {listnode *ret=new ListNode (0); The final returned pointer ListNode *ret1=ret;//represents the RET to be linked to the node's pointer listnode *pre=head;//the first node of each repeating group ListNode *cur=hea d;//the last node of each

Topic:Given a sorted linked list, delete all nodes that has duplicate numbers, leaving only distinct numbers from the Original list.For example,Given1->2->3->3->4->4->5, return1->2->5.Given1->1->1->2->3, return2->3.Idea: First lock the head, and then handle the middle position, remember the last processing tail, knowledge cumbersome, processing the head, found a node, the current node does not have the same continuous node, the node and the post-seque

I feel that my self-written answers are more concise than I can see. I 'd like to share with you: Class solution {public: listnode * deleteduplicates (listnode * head) {If (Head = NULL) return NULL; listnode res (-1); listnode * pre = res; pre-> next = head; bool flag = true; while (Head! = NULL) {If (Head-> next = NULL | head-> Val! = Head-> next-> Val) {If (! Flag) pre-> next = head-> next; else pre = pre-> next; flag = true;} else flag = false; head = head-> next ;} return res. next ;}};

Three pointers, one pre, one cur, one next (the next different number)If you do not encounter duplicate numbers, then all three move forward one cellIf a duplicate number is encountered, then Pre.next = Next, this time the pre does not change1 PublicListNode deleteduplicates (ListNode head) {2 if(Head = =NULL) {3 return NULL;4 }5ListNode dummy =NewListNode (-1);6Dummy.next =head;7 BooleanDUP =false;8ListNode next =head;9ListNode cur =head;TenListNode pre

Town Field Poem:——— Dream who feel, the water month Build blog. Baiqian tribulation, only know the vicissitudes of the world.——— today holds the Buddhist language, the technology is boundless willing to learn. Willing to do what you learn, cast a conscience blog.——————————————————————————————————————————1 Code1 list1=[1,2]2 list2=[2,3]3 list3=list1+list24 5Print(LIST3)2 Show——————————————————————————————————————————The essence of the blog, in the technical part, more in the town yard a poem.Pyt

Title Description:Reads a string of letters (no more than 30 characters) from the keyboard.Remove 3 non-repeating characters from the string and ask for all the extraction.The characters that are removed require a string in ascending alphabetical order.Different output sequences can be used without consideration.For example:Input:AbcThe output:AbcInput:AbcdThe output:AbcAbdAcdBcdInput:AbcaaThe output:AbcPackage Ccf;import Java.util.arraylist;import Java.util.hashset;import java.util.linkedhashse

Topic:Follow up for "Remove duplicates":What if duplicates is allowed at the most twice?For example,Given sorted array nums = [1,1,1,2,2,3] ,Your function should return length =, with the first 5 five elements of nums being 1 , 1 2 2 ,, and 3 . It doesn ' t matter what are you leave beyond the new length. test instructions and analysis : An ascending array is giv

Title:Follow up for "Remove duplicates":What if duplicates is allowed at the most twice?For example,Given sorted array nums = [1,1,1,2,2,3] ,your function should return length =5 , with the first five elements Ofnums Being1 , 1 , 2 and3 . It doesn ' t matter what are you leave beyond the new length. Test Instructions:Along with the question "

"026-remove duplicates from Sorted Array (delete duplicate elements in sorted array)""leetcode-Interview algorithm classic-java Implementation" "All topics Directory Index"Original QuestionGiven a sorted array, remove the duplicates in place such, all element appear only onc

Remove Duplicates from Sorted ArrayGiven a sorted array, remove the duplicates in place such, all element appear only once and return the new L Ength.Do the allocate extra space for another array, and you must does this on place with constant memory.For example,Given input array nums = [1,1,2] ,Your function should ret

Index: [Leetcode] leetcode key index (C++/JAVA/PYTHON/SQL)Github:https://github.com/illuz/leetcode026. Remove duplicates from Sorted Array (easy)links：Title: https://oj.leetcode.com/problems/remove-duplicates-from-sorted-array/Code (GitHub): Https://github.com/illuz/leetcode

Follow up for "Remove duplicates":What if duplicates is allowed at the most twice?For example,Given sorted array nums = [1,1,1,2,2,3] ,Your function should return length =, with the first 5 five elements of nums being 1 , 1 2 2 ,, and 3 . It doesn ' t matter what are you leave beyond the new length.Problem Solving Ideas:There are many ways to do this, and here is

position of the pointer after the previous pointer is reset to the present* Repeat the above process, to be able to count the total number of different elements, and the original array of the first I element is that I each other different elementsAC Code:/** * Front and back two pointers, the front hands fixed, after the pointer to search * until the pointer points to a different element than the previous pointer, then the second different elements, i++; * Before the pointer resets to the curre

Given a sorted array, remove the duplicates in place such, all element appear only once and return the new L Ength.Do the allocate extra space for another array, and you must does this on place with constant memory.For example,Given input array nums = [1,1,2] ,Your function should return length = 2 , with the first of the elements of nums being and 1 2 Respectivel Y. It doesn ' t matter what are you leave b

problem is always unable to deal with, gave up,This cleverly uses an int outside the loop to make a pointer to the original array , while the loop internally compares the pointer to the second and skips over the duplicate elements.Period compilation Error :1. The "=" is written in parentheses after the If "=";2. The ToArray method of set can only use the ToArray (New Int[set.size ())) so that there will be no transformation errors, but this can only be converted to a non-basic type (integer and

Follow up for "Remove duplicates":What if duplicates is allowed at the most twice?For example,Given sorted array nums = [1,1,1,2,2,3] ,Your function should return length =, with the first 5 five elements of nums being 1 , 1 2 2 ,, and 3 . It doesn ' t matter what are you leave beyond the new length.is the 26th version of the extension, 26 is to give a sorted arra

Topic:Follow up for "Remove duplicates":What if duplicates is allowed at the most twice?For example,Given sorted array nums = [1,1,1,2,2,3] ,Your function should return length =, with the first 5 five elements of nums being 1 , 1 2 2 ,, and 3 . It doesn ' t matter what are you leave beyond the new length.Idea: Record the number of times for each number, and maint

Problem:Given a sorted array, remove the duplicates in place such, all element appear only once and return the new L Ength.Do the allocate extra space for another array, and you must does this on place with constant memory.for example,given input Arraynums =[1,1,2] , your function should return length =2 , with the first and elements Ofnums Being1 and2 respectively. It doesn ' t matter what are you lea

Title Description:Given a sorted array, remove the duplicates in place such, all element appear only once and return the new L Ength.Do the allocate extra space for another array, and you must does this on place with constant memory.For example,Given input array nums = [1,1,2] ,Your function should return length = 2 , with the first of the elements of nums being and 1 2 Respectivel Y. It doesn ' t matter wh