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Mr. Frog has n sticks, whose lengths are 1,2, 3⋯⋯n respectively. Wallice is a bad man, so he does not want Mr. Frog to form a triangle with three of the sticks here. He decides to steal some sticks!

Mr. Frog has two sequences a1,a2,⋯,ana1,a2,⋯,an and b1,b2,⋯,bmb1,b2,⋯,bm and a number p. He wants to know the number of positions q such that sequence b1,b2,⋯,bmb1,b2,⋯,bm is exactly the sequence 

DNA Consensus String Time limit: 3.000 seconds Figure 1.DNA (Deoxyribonucleic Acid) is the molecule which contains the genetic instructions. It consists of four different nucleotides, namely A

B. The Eternal Immortality time limit per test 1 second memory limit per test 256 megabytes input standard input output standard output Even if the world is full of coun

Description Ancient Roman empire had a strong government system with various departments, including a secret service department. Important documents were sent between provinces and the capital in e

KazaQ wears socks everyday.  At the beginning, he has nn pairs of socks numbered from 11 to nn in his closets.  Every morning, he puts on a pair of socks which has the smallest number in the

Alice and Bob are playing a kind of special game on an N*M board (N rows, M columns). At the beginning, there are N*M coins in this board with one in each grid and every coin may be upward or downward