Flipkart Cart Odd Even Reorder
Flipkart Cart Odd Even Reorder
MediumLinked Lists100% accepted
Flipkart cart items are in a linked list. Regroup so all odd-indexed nodes come first, then even-indexed nodes. Indices start at 1. Maintain relative order within groups. Do it in O(1) space.
Approach
Reorder linked list: odd-index nodes first, then even-index nodes.
Input
5
1 2 3 4 5
Output
1 3 5 2 4
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