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The Cow LexiconTime Limit:2000MSMemory Limit:65536KTotal Submissions:4716Accepted:2144DescriptionFew know that the cows have their own dictionary withW(1 ≤W≤ 600) words, each containing no more 25 of the characters 'a'..'z'. Their cowmunication system, based on mooing, is not very ac 阅读全文
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Cash MachineTime Limit:1000MSMemory Limit:10000KTotal Submissions:15684Accepted:5369DescriptionA Bank plans to install a machine for cash withdrawal. The machine is able to deliver appropriate @ bills for a requested cash amount. The machine uses exactly N distinct bill denominations, say Dk, k=1,N, 阅读全文
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BalanceTime Limit:1000MSMemory Limit:30000KTotal Submissions:5009Accepted:2969DescriptionGigel has a strange "balance" and he wants to poise it. Actually, the device is different from any other ordinary balance.It orders two arms of negligible weight and each arm's length is 15. Some h 阅读全文