singly linked list java

Topic:Given A linked list, determine if it has a cycle in it.Ideas:For judging whether the chain list has a ring, the method is very simple, with two pointers, beginning to point to the head node, one is a fast pointer, two steps at a time, a slow pointer, one step at a time, when two pointers coincide with the existence of the ring.Fast first into the ring, afte

Topic:Reverse a linked list from position m to N. Do it in-place and in One-pass.For example:Given 1->2->3->4->5->NULL , m = 2 and n = 4,Return 1->4->3->2->5->NULL .Note:Given m, n satisfy the following condition:1 ≤ m ≤ n ≤length of list.Ideas:Find the M node, reverse the pointer from node m to N, and then concatenate the flip-up/** Definition for singly-

$hero 2,new Hero (2,"Lu Junyi", "Jade Kylin") Connect two objects,$hero->next= $hero 2 Traversing a linked list Define a function Showheros (), parameter:$head Object Defines a temporary variable $cur to store $head Objects while loop, condition $cur->next not null Print a bit Pointer moves back,$cur = $cur->next PHP Version: Php/** * Hero class*/classhero{ Public $no; Public $name; Public $nickname

Title: Reverse list of nodes from m-n locationsFor example:Given1->2->3->4->5->null, m = 2 and n = 4,Return1->4->3->2->5->null.The nodes from the second to the fourth are reversed.where m and n satisfy the condition:1≤ m ≤ N ≤length of the list.Ideas:Still in reverse order, consider using a secondary space stack.The nodes of the m-n are sequentially placed into the stack and marked with the front and back two nodes adjacent to the stack node Pfirst an

. After two traversal, the pointerpAThe pointer is located at node 4 in linked list B.pBIt will also reach the position of node 4 in the linked list A. the next traversal of the two pointers will encounter at node 9 (that is, the intersection node. At this time, the length of the two pointers is \ (l1 + l2 + l3 \). Th

Two-way linked listAndDouble-ended linked listAre different concepts. A double-ended linked list refers to the head node of a linked list, which not only points to the first node but also the last node. A two-way

remaining red lines It is a Y and a Z. We know that the length of the multiple steps is m, that is, Y + z = m. The blue line is also M, that is, x + z = m. So if we launch x = y directly, we will understand the second step. If the fast node goes through a lot of circles, we can draw our own pictures and find that the model of the above figure is actually down. Code Attached /** * Definition for singly-linked