Chefland Army

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**This is not intended to be the tie-break problem.** In the Chefland army, there are $M$ generals (numbered $1$ through $M$) and $N$ soldiers (numbered $1$ through $N$). The Army has a vertical hierarchy ― a soldier may command many other soldiers (including zero), but each soldier has at most one commander. A soldier $y$ is a *subordinate* of a soldier $x$ if soldier $x$ is the commander o

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solution.cppC++17

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