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Cows are such finicky eaters. Each cow has a preference for certain foods and drinks, and she will consume no others. Farmer John has cooked fabulous 阅读全文
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B. Little Elephant and Array time limit per test 4 seconds memory limit per test 256 megabytes input standard input output standard output B. Little E 阅读全文
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Drainage Ditches Drainage Ditches Drainage Ditches Description Every time it rains on Farmer John's fields, a pond forms over Bessie's favorite clover 阅读全文