Build Towers

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There are $N$ cities connected by roads such that they form a tree-like structure. Your task is to build exactly $A_i$ towers in $i^{th}$ city. One or multiple towers can be built in a city only if there is a brick factory present in that city. Currently, only city $1$ has a brick factory. To complete the project, you can do the following two types of operations: - Type $1$: Construct a tower

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solution.cppC++17

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