Harshikaa and the Rain

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There is a [tree](https://en.wikipedia.org/wiki/Tree_(data_structure)) with $N$ nodes numbered from $1$ to $N$ outside Harshikaa's house. The tree is rooted at node $1$. Initially the tree was dry, there were no raindrops on any node of the tree. Suddenly it started raining, and every second a drop falls on all the leaf nodes of the tree. Also, every second any drop which wasn't already on the ro

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solution.cppC++17

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