Chef and Covid

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In chef's city, COVID-19 is spreading rapidly. The government has hired chef to make an app that tracks human interactions. There are $N$ people in the city named from $1$ to $N$. People can interact with each other and can form subgroups of infected people. A human interaction is denoted by an integer pair $(u,v)$ means that both are infected after the interaction. It is not clear who infect

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solution.cppC++17

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