Chef Designed a Network

CodeChefRating 1945Open on judge ↗

Chef is a network engineer at CodeChef. Currently, he has to design a network that connects $N$ computers (numbered $1$ through $N$). The network should consist of these $N$ computers and exactly $M$ cables. Usually, a cable needs to connect two different computers, but Chef is okay with connecting computers to themselves too. Therefore, let's describe a cable by the pair of computers $(u, v)$

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solution.cppC++17

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