Convert a binary tree to a DLL such that a next node for DLL is selected in a top down order in zig-zag manner. O(n) space was allowed, but not O(2n)
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Convert binary tree to DLL in zig-zag order with O(n) space
Traverse binary tree in zig-zag order using level order traversal
Keep track of previous and next nodes to link them in DLL
Handle edge cases l...read more
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