Codeforces Round 226 (Div. 2)
C
Bear and Prime Numbers
Codeforces
1700
原题
← BD →
翻译中…

Recently, the bear started studying data structures and faced the following problem.

翻译中…

You are given a sequence of integers $*x*_{1}, *x*_{2}, ..., *x*_{*n*}$ of length $*n*$ and $*m*$ queries, each of them is characterized by two integers $*l*_{*i*}, *r*_{*i*}$. Let's introduce $*f*(*p*)$ to represent the number of such indexes $*k*$, that $*x*_{*k*}$ is divisible by $*p*$. The answer to the query $*l*_{*i*}, *r*_{*i*}$ is the sum: image, where $*S*(*l*_{*i*}, *r*_{*i*})$ is a set of prime numbers from segment $[*l*_{*i*}, *r*_{*i*}]$ (both borders are included in the segment).

翻译中…

Help the bear cope with the problem.

翻译中…

Input

翻译中…

The first line contains integer $*n*$ $(1 ≤ *n* ≤ 10^{6})$. The second line contains $*n*$ integers $*x*_{1}, *x*_{2}, ..., *x*_{*n*}$ $(2 ≤ *x*_{*i*} ≤ 10^{7})$. The numbers are not necessarily distinct.

翻译中…

The third line contains integer $*m*$ $(1 ≤ *m* ≤ 50000)$. Each of the following $*m*$ lines contains a pair of space-separated integers, $*l*_{*i*}$ and $*r*_{*i*}$ $(2 ≤ *l*_{*i*} ≤ *r*_{*i*} ≤ 2·10^{9})$ — the numbers that characterize the current query.

翻译中…

Output

翻译中…

Print $*m*$ integers — the answers to the queries on the order the queries appear in the input.

翻译中…

Note

翻译中…

Consider the first sample. Overall, the first sample has 3 queries.

翻译中…
  1. The first query $*l* = 2$, $*r* = 11$ comes. You need to count $*f*(2) + *f*(3) + *f*(5) + *f*(7) + *f*(11) = 2 + 1 + 4 + 2 + 0 = 9$.
  2. The second query comes $*l* = 3$, $*r* = 12$. You need to count $*f*(3) + *f*(5) + *f*(7) + *f*(11) = 1 + 4 + 2 + 0 = 7$.
  3. The third query comes $*l* = 4$, $*r* = 4$. As this interval has no prime numbers, then the sum equals 0.
翻译中…

样例

Input #1
6
5 5 7 10 14 15
3
2 11
3 12
4 4
Output #1
9
7
0
InputCopy OutputCopy
Input #2
7
2 3 5 7 11 4 8
2
8 10
2 123
Output #2
0
7
InputCopy OutputCopy
题目信息
题号
385C
时间限制
2 s
内存限制
512 MB
标签
二分
暴力
数据结构
动态规划
模拟
数学
数论

题面与样例版权归 Codeforces 及出题人所有;中文翻译由 AI 生成(CI 管线),如有出入请以原文为准。