HDU 5726 GCD

Source: Internet
Author: User

Transmission Door

GCD

Time limit:10000/5000 MS (java/others) Memory limit:65536/65536 K (java/others)



problem Description
Give you a sequence of $N (n≤100,000) $ integers: $a _1,\cdots,a_n (0<a_i≤1000,000,000) $. There is $Q (q≤100,000) $ queries. For each query $l, R $ calculate $\TEXT{GCD} (A_l,,a_{l+1},\cdots,a_r) $ and count the number of pairs$ (l′,r′) <r≤n) $such that $\TEXT{GCD} (a_{l′},a_{l′+1},\cdots,a_{r′}) $ equal $\TEXT{GCD} (A_l,a_{l+1},..., A_{r}) $.


Input
The first line of input contains a number $T $, which stands for the number of test cases you need to solve.

The first line of all case contains a number $N $, denoting the number of integers.

The second line contains $N $ integers, $a _1,\cdots,a_n (0<a_i≤1000,000,000) $.

The third line contains a number $Q $, denoting the number of queries.

For the next $Q $ lines, $i \text{-th}$ line contains, and stand for the $l _i,r_i$, stand for the $i \text{-th}$ quer ies.


Output
Need to output ' case #:t ' at the beginning. (with quotes, t means the number of the "test Case", begin from 1).

For each query, you need to the output of the numbers in a line. The first number stands for $\TEXT{GCD} (a_l,a_{l+1}, \cdots,a_r) $ and the second number stands for the number of pairs$ (l′ , r′) $ such that $\TEXT{GCD} (a_{l′},a_{l′+1},\cdots,a_{r′}) $ equal $\text{gcd} (A_l,a_{l+1},\cdots,a_r) $.


Sample Input

1
5
1 2 4) 6 7
4
1 5
2 4
3 4
4 4



Sample Output

Case #1:
1 8
2 4
2 4
6 1



Author
Hit


Source
Multi-university Training Contest 1

Test instructions

Support query: (1) Interval gcd, (2) gcd value equals K interval number

Solution:

Interval GCD Query line tree can be resolved, in addition to support a single point of modification. But this problem requires support query gcd value equals k interval number, line tree is a bit weak, because this information is probably not very good by merging interval information to get. Let's consider the nature of the interval gcd:

Make $\text{gcd}_r (l) $ indicate, L to r gcd. we

HDU 5726 GCD

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.