Horse racing

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Problem description. Geralt owns S horses. He wants to keep only horses that can run very fast. He decides which horses are fast by making them race against each other. If a horse comes in last, then Geralt will sell it. The race course consists of N checkpoints and E roads. Geralt positions his horses at the first S checkpoints i.e., checkpoints 1 to S. The checkpoint N is chosen as the finish

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solution.cppC++17

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