Ciel and Random Walk

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Today, Ciel's restaurant is closed. Ciel is bored, so she decides to take a walk randomly. This town has N intersections and M one way roads. The i-th road connects from the Ai-th intersection to the Bi-th intersection. Ciel is in the 1st intersection now, and Ciel's house is in the N-th intersection. If Ciel is in the i-th intersection, she will take a walk as follows: - If i = N, her walk is

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solution.cppC++17

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