AtCoder Grand Contest 015
F
Kenus the Ancient Greek
AtCoder
⌀ 4083
原题
← E→
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Problem Statement

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Kenus, the organizer of International Euclidean Olympiad, is seeking a pair of two integers that requires many steps to find its greatest common divisor using the Euclidean algorithm.

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You are given $Q$ queries. The $i$-th query is represented as a pair of two integers $X_i$ and $Y_i$, and asks you the following: among all pairs of two integers $(x,y)$ such that $1 ≤ x ≤ X_i$ and $1 ≤ y ≤ Y_i$, find the maximum Euclidean step count (defined below), and how many pairs have the maximum step count, modulo $10^9+7$.

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Process all the queries. Here, the Euclidean step count of a pair of two non-negative integers $(a,b)$ is defined as follows:

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  • $(a,b)$ and $(b,a)$ have the same Euclidean step count.
  • $(0,a)$ has a Euclidean step count of $0$.
  • If $a > 0$ and $a ≤ b$, let $p$ and $q$ be a unique pair of integers such that $b=pa+q$ and $0 ≤ q < a$. Then, the Euclidean step count of $(a,b)$ is the Euclidean step count of $(q,a)$ plus $1$.
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Constraints

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  • $1 ≤ Q ≤ 3 × 10^5$
  • $1 ≤ X_i,Y_i ≤ 10^{18}(1 ≤ i ≤ Q)$
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Input

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The input is given from Standard Input in the following format:

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Q
X_1 Y_1
:
X_Q Y_Q

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Output

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For each query, print the maximum Euclidean step count, and the number of the pairs that have the maximum step count, modulo $10^9+7$, with a space in between.

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样例

Input #1
3
4 4
6 10
12 11
Output #1
2 4
4 1
4 7
In the first query, $(2,3)$, $(3,2)$, $(3,4)$ and $(4,3)$ have a Euclidean step count of $2$. No pairs have a step count of more than $2$. In the second query, $(5,8)$ has a Euclidean step count of $4$. In the third query, $(5,8)$, $(8,5)$, $(7,11)$, $(8,11)$, $(11,7)$, $(11,8)$, $(12,7)$ have a Euclidean step count of $4$.
Input #2
10
1 1
2 2
5 1000000000000000000
7 3
1 334334334334334334
23847657 23458792534
111111111 111111111
7 7
4 19
9 10
Output #2
1 1
1 4
4 600000013
3 1
1 993994017
35 37447
38 2
3 6
3 9
4 2
题目信息
题号
agc015_f
时间限制
5 s
内存限制
256 MB

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