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FroggerDescriptionFreddy Frog is sitting on a stone in the middle of a lake. Suddenly he notices Fiona Frog who is sitting on another stone. He plans ... 阅读全文
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Cow ContestDescriptionN (1 ≤ N ≤ 100) cows, conveniently numbered 1..N, are participating in a programming contest. As we all know, some cows code bet... 阅读全文
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WormholesDescriptionWhile exploring his many farms, Farmer John has discovered a number of amazing wormholes. A wormhole is very peculiar because it i... 阅读全文
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ArbitrageDescriptionArbitrage is the use of discrepancies in currency exchange rates to transform one unit of a currency into more than one unit of th... 阅读全文
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The Fewest CoinsDescriptionFarmer John has gone to town to buy some farm supplies. Being a very efficient man, he always pays for his goods in such a ... 阅读全文