Problem Description
Given a multi-dimensional array of integers, return a generator object which yields integers in the same order as inorder traversal. A multi-dimensional array is a recursive data structure that contains both integers and other multi-dimensional arrays. Inorder traversal iterates over each array from left to right, yielding any integers it encounters or applying inorder traversal to any arrays it encounters.
Key Insights
- The problem requires traversal of a recursive data structure (multi-dimensional array) without flattening it.
- A generator is used to yield values one at a time, which is memory efficient.
- The solution needs to handle both integers and nested arrays dynamically.
Space and Time Complexity
Time Complexity: O(n), where n is the total number of integers in the multi-dimensional array. Each integer is yielded once. Space Complexity: O(d), where d is the maximum depth of nested arrays due to the call stack during recursion.
Solution
The solution employs a recursive approach using a generator function. The generator traverses the multi-dimensional array, yielding integers as they are encountered. For nested arrays, the generator calls itself recursively, maintaining the order of elements as specified by inorder traversal. This avoids the need for additional data structures to flatten the array.