The Weekly Challenge

10. TASK #2: Perfect Totient Numbers

HEADLINES

Welcome to Week #175 of the weekly challenge.

Let us all welcome, Nicolas Mendoz and thanks for the contribution in Perl.

Thank you, Gurunandan Bhat for the first contribution in Perl.

Laurent Rosenfeld once again, the lead guest contributors with 22 solutions in 18 different languages. Thank you.

Getting back on track with contributions, I have shared solutions in Perl, Raku, Python, Java and Swift.

`Task #1: Disarium Numbers`

+------+---------+------------+---------+--------+--------+
|      |   Perl  |    Raku    |  Python |  Java  |  Swift |
+------+---------+------------+---------+--------+--------+
| real | 26.728s | 9m 11.931s | 50.547s | 3.557s | 7.283s |
| user | 25.375s | 8m 26.000s | 46.625s | 3.031s | 1.406s |
| sys  | 0.875s  |   2.438s   | 0.484s  | 0.734s | 1.984s |
+------+---------+------------+---------+--------+--------+

`Task #2: Permutation Ranking`

+------+---------+--------+--------+--------+--------+
|      |   Perl  |  Raku  | Python |  Java  |  Swift |
+------+---------+--------+--------+--------+--------+
| real | 1.704s  | 1.819s | 1.697s | 0.648s | 3.091s |
| user | 0.313s  | 0.875s | 0.547s | 0.344s | 1.406s |
| sys  | 0.500s  | 0.328s | 0.609s | 0.391s | 1.250s |
+------+---------+--------+--------+--------+--------+

I have sent enquiry about T-shirt order and received the automated reply. Waiting for the proper response.

T-shirt Campaign

Blogs with Creative Title

1. Permutations Ranked in Disarray on Mars by Adam Russell.

2. Disarmed Ranking by Arne Sommer.

3. the power of permutations by Luca Ferrari.

4. The Rank Smell of Disarium by Roger Bell_West.

GitHub Repository Stats

1. Commits: 26,808 (+144)

2. Pull Requests: 6,488 (+38)

3. Contributors: 201 (+2)

4. Fork: 253

5. Stars: 143 (+1)

Our solo sponsor Pete Sergeant has been a great support to keep us motivated. We are lucky that he agreed to continue the journey with us in the year 2022. I would like to personally thank Pete and his entire team for their generosity. It would be great if we could add few more to sponsor the prize money so that we could go back and declare weekly champions as we have done in the past. I hope and wish this will become possible in 2022. The amount doesn’t have to be huge. However, it would be nice to show off bunch of supporters. If an organisation comes forward and supports us then that would be the ultimate achievement.

RECAP

Quick recap of The Weekly Challenge - 174 by Mohammad S Anwar.

PERL REVIEW

Please check out Perl solutions review of The Weekly Challenge - 169 by Colin Crain.

If you missed any past reviews then please check out the collection.

RAKU REVIEW

If you missed any past reviews then please check out the collection.

CHART

Please take a look at the charts showing interesting data.

I would like to THANK every member of the team for their valuable suggestions. Please do share your experience with us.

NEW MEMBERS

Nicolas Mendoz, an experienced Perl hacker from Oslo, Norway.

Please find out How to contribute?, if you have any doubts.

Please try the excellent tool EZPWC created by respected member Saif Ahmed of Team PWC.

GUESTS

Please checkout the guest contributions for the Week #174.

Please find past solutions by respected guests. Please share your creative solutions in other languages.

Task 1: Last Sunday

Submitted by: Mohammad S Anwar

Write a script to list Last Sunday of every month in the given year.

For example, for year 2022, we should get the following:

Task 2: Perfect Totient Numbers

Submitted by: Mohammad S Anwar

Write a script to generate first 20 Perfect Totient Numbers. Please checkout wikipedia page for more informations.

Output

3, 9, 15, 27, 39, 81, 111, 183, 243, 255, 327, 363, 471, 729,
2187, 2199, 3063, 4359, 4375, 5571

Last date to submit the solution 23:59 (UK Time) Sunday 31st July 2022.