Unusual Sequences
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Description
Count the number of distinct sequences a1, a2, ..., an (1 ≤ ai) consisting of positive integers such that gcd(a1, a2, ..., an) = x and 
. As this number could be large, print the answer modulo 109 + 7.
gcd here means the greatest common divisor.
The only line contains two positive integers x and y (1 ≤ x, y ≤ 109).
Print the number of such sequences modulo 109 + 7.
Input
The only line contains two positive integers x and y (1 ≤ x, y ≤ 109).
Output
Print the number of such sequences modulo 109 + 7.
3 9
5 8
3
0
Note
There are three suitable sequences in the first test: (3, 3, 3), (3, 6), (6, 3).
There are no suitable sequences in the second test.
2024暑期集训第五周小测
- 状态
- 已结束
- 规则
- ACM/ICPC
- 题目
- 6
- 开始于
- 2024-7-31 19:00
- 结束于
- 2024-7-31 21:00
- 持续时间
- 2 小时
- 主持人
-
CCNUACM
- 参赛人数
- 33