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Problem Description The harmonic value of the permutation p1,p2,⋯pn is Mr. Frog is wondering about the permutation whose harmonic value is the strictl 阅读全文
posted @ 2018-09-09 20:23
皮皮虎
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Problem Description Mr. Frog recently studied how to add two fractions up, and he came up with an evil idea to trouble you by asking you to calculate 阅读全文
posted @ 2018-09-09 18:48
皮皮虎
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