|시간 제한||메모리 제한||제출||정답||맞은 사람||정답 비율|
|1 초||256 MB||30||22||20||71.429%|
Given a positive integer, N, the sequence of all fractions a / b with (0 < a b), (1 < b N) and a and b relatively prime, listed in increasing order, is called the Farey Sequence of order N.
For example, the Farey Sequence of order 6 is:
0/1, 1/6, 1/5, 1/4, 1/3, 2/5, 1/2, 3/5, 2/3, 3/4, 4/5, 5/6, 1/1
For this problem, you will write a program to compute the length of the Farey sequence of order N (input).
The first line of input contains a single integer P, (1 ≤ P ≤ 10000), which is the number of data sets that follow. Each data set should be processed identically and independently.
Each data set consists of a single line of input. It contains the data set number, K, followed by the order N, N (2 ≤ N ≤ 10000), of the Farey Sequence whose length is to be found.
For each data set there is a single line of output. The single output line consists of the data set number, K, followed by a single space followed by the length of the Farey Sequence as a decimal integer.
4 1 6 2 15 3 57 4 9999
1 13 2 73 3 1001 4 30393487