摘要： Time Limit:2000MSMemory Limit:65536KTotal Submissions:7290Accepted:3409DescriptionFew 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 accurate; sometim 阅读全文