New Flight Routes

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There are n cities and m flight connections between them. Your task is to add new flights so that it will be possible to travel from any city to any other city. What is the minimum number of new flights required? Input The first input line has two integers n and m: the number of cities and flights. The cities are numbered 1,2,\dots,n. After this, there are m lines describing the flights. Each l

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solution.cppC++17

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