SP6517 JOCHEF - Farmer Sepp

Chief Farmer Josef aka Sepp needs to crop hay several times through the summer. Due to high petrol costs he can currently use his truck only once to drive to a spot where he will harvest the dried grass. Lazy by nature, John does not want to harvest those parts of the field which contain cows, since this would involve too much energy. Furthermore, John just crops a rectangular part of the field. **Input** Input contains multiple test cases. You are given three integers M, N, F (0 < M, N

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