摘要：Mr. Frog has two sequences a1,a2,⋯,an and b1,b2,⋯,bm and a number p. He wants to know the number of positions q such that sequence b1,... 阅读全文

摘要：The little cat is so famous, that many couples tramp over hill and dale to Byteland, and asked the little cat to give names to their n... 阅读全文

摘要：For each prefix of a given string S with N characters (each character has an ASCII code between 97 and 126, inclusive), we want to kno... 阅读全文

摘要：CC always becomes very depressed at the end of this month, he has checked his credit card yesterday, without any surprise, there are o... 阅读全文

摘要：Given two sequences of numbers : a[1], a[2], …… , a[N], and b[1], b[2], number K which make a[K] = b[1], a[K + 1] = b[2], …… , a[K + M... 阅读全文