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46 lines
1.0 KiB
JavaScript
46 lines
1.0 KiB
JavaScript
/**
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* A LinkedList based solution for Rotating a List to the right by k places
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*/
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function main () {
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/*
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Problem Statement:
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Given a linked list, rotate the list to the right by k places, where k is non-negative.
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Note:
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* While Solving the problem in given link below, don't use main() function.
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* Just use only the code inside main() function.
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* The purpose of using main() function here is to aviod global variables.
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Link for the Problem: https://leetcode.com/problems/rotate-list/
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*/
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// Reference to both head and k is given in the problem. So please ignore below two lines
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let head = ''
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let k = ''
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let i = 0
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let current = head
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while (current) {
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i++
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current = current.next
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}
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k %= i
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current = head
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let prev = null
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while (k--) {
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if (!current || !current.next) {
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return current
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} else {
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while (current.next) {
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prev = current
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current = current.next
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}
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prev.next = current.next
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current.next = head
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head = current
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}
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}
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return head
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}
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main()
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