ACMIIITB2018P8

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Its the King of Asgard again. The king is planning to set a long relay racing. Asgard is a city of n junctions and m streets where all streets are unidirectional. In the relay, people have to follow the direction of the streets. People can walk the same street several times. For example, suppose Asgard contains 7 junctions and 7 streets. Junctions 1 and 3 are not connected to any other junctions

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solution.cppC++17

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