Zepto Warehouse Inventory Leaf Count
Zepto Warehouse Inventory Leaf Count
EasyTrees66% accepted
Zepto's warehouse inventory is arranged as a binary tree where leaf nodes represent actual stock-keeping units (SKUs). Given the root of a binary tree, count the total number of leaf nodes.
Approach
Count leaf nodes (nodes with no children) in a binary tree.
Input
7
1 2 3 4 5 6 7
Output
4
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