Flipkart Category Level Order
Flipkart Category Level Order
EasyTrees100% accepted
Flipkart organises its product catalog as a binary tree of categories. Given the root of a binary tree of category node values, return the level-order traversal as a list of lists (values at each depth from left to right).
Approach
Return level-order traversal of a binary tree as a list of lists.
Input
3
3 9 20 -1 -1 15 7
Output
[[3],[9,20],[15,7]]
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