A10676 | Bash Plays with Functions
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题目描述
Bash got tired on his journey to become the greatest Pokemon master. So he decides to take a break and play with functions.
Bash defines a function $f_{0}(n)$ , which denotes the number of ways of factoring $n$ into two factors $p$ and $q$ such that $gcd(p,q)=1$ . In other words, $f_{0}(n)$ is the number of ordered pairs of positive integers $(p,q)$ such that $p·q=n$ and $gcd(p,q)=1$ .
But Bash felt that it was too easy to calculate this function. So he defined a series of functions, where $f_{r+1}$ is defined as:
Where $(u,v)$ is any ordered pair of positive integers, they need not to be co-prime.
Now Bash wants to know the value of $f_{r}(n)$ for different $r$ and $n$ . Since the value could be huge, he would like to know the value modulo $10^{9}+7$ . Help him!
Bash defines a function $f_{0}(n)$ , which denotes the number of ways of factoring $n$ into two factors $p$ and $q$ such that $gcd(p,q)=1$ . In other words, $f_{0}(n)$ is the number of ordered pairs of positive integers $(p,q)$ such that $p·q=n$ and $gcd(p,q)=1$ .
But Bash felt that it was too easy to calculate this function. So he defined a series of functions, where $f_{r+1}$ is defined as:
Where $(u,v)$ is any ordered pair of positive integers, they need not to be co-prime.
Now Bash wants to know the value of $f_{r}(n)$ for different $r$ and $n$ . Since the value could be huge, he would like to know the value modulo $10^{9}+7$ . Help him!
输入格式
The first line contains an integer $q$ ( $1<=q<=10^{6}$ ) — the number of values Bash wants to know.
Each of the next $q$ lines contain two integers $r$ and $n$ ( $0<=r<=10^{6}$ , $1<=n<=10^{6}$ ), which denote Bash wants to know the value $f_{r}(n)$ .
Each of the next $q$ lines contain two integers $r$ and $n$ ( $0<=r<=10^{6}$ , $1<=n<=10^{6}$ ), which denote Bash wants to know the value $f_{r}(n)$ .
输出格式
Print $q$ integers. For each pair of $r$ and $n$ given, print $f_{r}(n)$ modulo $10^{9}+7$ on a separate line.
输入输出样例
输入 #1
5 0 30 1 25 3 65 2 5 4 48
输出 #1
8 5 25 4 630
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评测结果:Accepted