(Challenge) Codechef War II

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Chefland is a country with $N$ cities (numbered $1$ through $N$) and $M$ bidirectional roads (numbered from $1$ through $M$). Each road connects two different cities and no two different roads connect the same pair of cities. Bitland declared war on Chefland and after multiple battles, all roads of Chefland have ended up in a very bad state. Moreover, the war is causing psychological damage to th

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solution.cppC++17

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