publicboolisLoopList(ListNode<T> head){ListNode<T> slowPointer, fastPointer;//使用快慢指针,慢指针每次向前一步,快指针每次两步slowPointer = fastPointer = head;while(fastPointer != null && fastPointer.next != null){slowPointer = slowPointer.next;fastPointer = fastPointer.next.next;//两指针相...
distance(快指针) = 2 * distance(慢指针),即 k + loop + m = 2 * ( k + m ),化解得出 loop = k + m 分析起始点的位置:通过慢指针继续走loop - m步就可以到达环的起始位置,正好k=loop - m,所以,相遇时把快指针指向头指针,两个指针以相同的速度走k步就可以一起到达环的起始位置了。 可以看...
Commits BreadcrumbsHistory for leetcode Find the first node of loop in linked list - GFG onmain User selector All users DatepickerAll time Commit History Loading Footer © 2025 GitHub, Inc. Footer navigation Terms Privacy Security Status Docs Contact Manage cookies Do not share...
Here's a list of 30 coding interview patterns, each with one or two example LeetCode problems:1. Sliding WindowProblem 1: Minimum Size Subarray Sum Problem 2: Longest Substring Without Repeating Characters2. Two PointersProblem 1: 3Sum Problem 2: Container With Most Water...
First loop let hte fast is n+1 step faster than slow. Second loop, both pointer go together. Stop when fast pointer meet the end.3 Q Merge Two Sorted ListsMerge two sorted linked lists and return it as a new sorted list. The new list should be made by splicing together the nodes...
B = headB while B: A = headA while A: if A == B: return A A = A.next B = B.next return None 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 然后用了这个题解 class Solution: # @param two ListNodes ...
5.删除链表中的元素 [Remove Linked List Elements]https://leetcode.com/problems/remove-linked-list-elements/description/ solution:链表删除的统一做法,要注意找到删除节点的前一个节点/** * Definition for singly-linked list. * public class ListNode { * int val; * ListNode next; * ListNode(int x)...
leetcode234-Palindrome Linked List回文链表(python) 法1:辅助数组,转化为数组问题。时间O(n),空间O(n) 法2: 利用快慢指针找到链表的中点,将链表的后半部分反序后和链表的前半部分进行一一对比。时间O(n),空间O(1) 另一种思路:利用快慢指针找到链表的中点,在找的过程中同时将慢指针处的值存入stack,利用st...
LeetCode problem solving notes. Define a function, input the head node of a linked list, reverse the linked list and output the head node of the reversed linked list.
LeetCode problem solving notes. Determine whether a linked list is a palindrome linked list. First convert the linked list into an array, and then judge whether the array is a palindrome array.