Medium Accuracy: 49.14%
Submissions: 32429 Points: 4
Given a singly linked list, the task is to rearrange it in a way that all odd position nodes are together and all even positions node are together.
Assume the first element to be at position 1 followed by second element at position 2 and so on. Note: You should place all odd positioned nodes first and then the even positioned ones. (considering 1 based indexing). Also, the relative order of odd positioned nodes and even positioned nodes should be maintained.
Example 1:
Input:
LinkedList: 1->2->3->4
Output: 1 3 2 4
Explanation:
Odd elements are 1, 3 and even elements are
2, 4. Hence, resultant linked list is
1->3->2->4.
Example 2:
Input:
LinkedList: 1->2->3->4->5
Output: 1 3 5 2 4
Explanation:
Odd elements are 1, 3, 5 and even elements are
2, 4. Hence, resultant linked list is
​1->3->5->2->4.
Your Task:
The task is to complete the function rearrangeEvenOdd() which rearranges the nodes in the linked list as required and doesn't return anything.
Expected Time Complexity: O(N). Expected Auxiliary Space: O(1).
Constraints:
1 ≤ Size of the linked list ≤ 104
0 ≤ value of linked list ≤ 103
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Avoid using static/global variables in coding problems as your code is tested
against multiple test cases and these tend to retain their previous values.
Passing the Sample/Custom Test cases in coding problems does not guarantee the
correctness of code. On submission, your code is tested against multiple test cases
consisting of all possible corner cases and stress constraints.
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