摘要：
The cows are journeying north to Thunder Bay in Canada to gain cultural enrichment and enjoy a vacation on the sunny shores of Lake Superior. Bessie, 阅读全文
摘要：
For a sequence S1,S2,⋯,SNS1,S2,⋯,SN, and a pair of integers (i,j)(i,j), if 1≤i≤j≤N1≤i≤j≤N and Si<Si+1<Si+2<⋯<Sj−1<SjSi<Si+1<Si+2<⋯<Sj−1<Sj, then the s 阅读全文