Lexicographically Minimum Tree Traversal

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You are given a tree with $N$ vertices, numbered from $1$ to $N$, and a designated root vertex $1$. Each vertex $i$ has an associated integer value $V_i$. You must construct a sequence of **values**, $B_1, B_2, \dots, B_N$, according to the following process on the tree: 1. Initially, only the root vertex is chosen. - Let the set of chosen vertices be $S$. - Initially, $S = \{1\}$. - The

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solution.cppC++17

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