The Weekly Challenge

HEADLINES

Welcome PokGoPun to the Team PWC. We now have 250 members in the team.

Last week, we had the opportunity to interview the latest champion, Alexander Pankoff. It was pleasure knowing him. Please do checkout to find out more about him.

Lubos Kolouch shared solution in Java for the first time. He has also shared in Python and PHP in the past. While talking about guest contributors, I would like to mention one more name, Eric Cheung. He was introduced to the weekly challenge by fellow member, Cheok-Yin Fung. He is currently ranked #12 and recently overtook Cheok-Yin Fung.

Enjoy the week with the another set of tasks. Good luck team.

Blogs with Creative Title

1. Challenge 152 Task #1 - Summing up minimums by Alexander Pankoff.

2. Challenge 152 Task #2 - Untangling the rects by Alexander Pankoff.

3. Triangular Rectangle with Raku by Arne Sommer.

4. The Path in the Pyramid by Colin Crain.

5. Who’s Masking the Mask? by Colin Crain.

6. Functional Paths: Weekly Challenge #152 Pt. 1 by Dave Jacoby

7. Think Inside The Box: Weekly Challenge #152 Pt. 2 by Dave Jacoby.

8. Perl Weekly Challenge 152: St. Valendtine’s sums and triangles by Luca Ferrari.

9. Lots of angles this week by Peter Campbell Smith.

10. The Weekly Challenge 152: Triangles, Rectangles, and Objects by Roger Bell_West.

11. Triangles and rectangles by Simon Green.

GitHub Repository Stats

1. Commits: 23,419 (+123)

2. Pull Requests: 5,677 (+32)

3. Contributors: 186

4. Fork: 243 (+1)

5. Stars: 119

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 2021. 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 2021. 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 - 152” by Mohammad S Anwar.

PERL REVIEW

Please check out Perl solutions review of the “The Weekly Challenge - 148” 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

PokGoPun, an experienced Perl hacker joined the Team PWC.

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 #152.

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

TASK #1 › Left Factorials

Submitted by: Mohammad S Anwar

Write a script to compute Left Factorials of 1 to 10. Please refer OEIS A003422 for more information.

Expected Output:

1, 2, 4, 10, 34, 154, 874, 5914, 46234, 409114

TASK #2 › Factorions

Submitted by: Mohammad S Anwar

You are given an integer, $n.

Write a script to figure out if the given integer is factorion.

A factorion is a natural number that equals the sum of the factorials of its digits.

Example 1:

Input: $n = 145
Output: 1

    Since 1! + 4! + 5! => 1 + 24 + 120 = 145

Example 2:

Input: $n = 123
Output: 0

    Since 1! + 2! + 3! => 1 + 2 + 6 <> 123

Last date to submit the solution 23:59 (UK Time) Sunday 27th February 2022.