Dunzo Delivery Surveillance Tree Cameras
Dunzo Delivery Surveillance Tree Cameras
HardTrees100% accepted
Dunzo monitors delivery routes modeled as a binary tree. Cameras placed at nodes monitor the node itself, its parent, and all direct children. Given the root of a binary tree, determine the minimum number of cameras needed to monitor every node in the tree.
Approach
Minimum number of cameras to monitor all nodes in a binary tree.
Input
4
0 0 0 0 0
Output
2
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