The Weekly Challenge

HEADLINES

Last week we declared Aaron Smith as the Champion of the month. We interview with him few days ago, please go check it out.

Let us all welcome, David Schwartz, to the Team PWC. In the first week itself, we have received solutions in Perl and Python.

Let us share some interesting stats from the GitHub repository.

1. Commits: 16,558 (+211)

2. Pull Requests: 4,042 (+44)

3. Contributors: 164 (+1)

4. Fork: 204

5. Stars: 92

Last but not least, I would like to thank each and every member for their support and encouragement.

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 - 111” by Mohammad S Anwar.

PERL REVIEW

Please check out Perl solutions review of the “Perl Weekly Challenge - 109” 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

David Schwartz, 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 #111.

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

TASK #1 › Canonical Path

Submitted by: Mohammad S Anwar

You are given a string path, starting with a slash ‘/'.

Write a script to convert the given absolute path to the simplified canonical path.

In a Unix-style file system:

- A period '.' refers to the current directory
- A double period '..' refers to the directory up a level
- Multiple consecutive slashes ('//') are treated as a single slash '/'

The canonical path format:

- The path starts with a single slash '/'.
- Any two directories are separated by a single slash '/'.
- The path does not end with a trailing '/'.
- The path only contains the directories on the path from the root directory to the target file or directory

Example

Input: "/a/"
Output: "/a"

Input: "/a/b//c/"
Output: "/a/b/c"

Input: "/a/b/c/../.."
Output: "/a"

TASK #2 › Climb Stairs

Submitted by: Mohammad S Anwar

You are given $n steps to climb

Write a script to find out the distinct ways to climb to the top. You are allowed to climb either 1 or 2 steps at a time.

Example

Input: $n = 3
Output: 3

    Option 1: 1 step + 1 step + 1 step
    Option 2: 1 step + 2 steps
    Option 3: 2 steps + 1 step

Input: $n = 4
Output: 5

    Option 1: 1 step + 1 step + 1 step + 1 step
    Option 2: 1 step + 1 step + 2 steps
    Option 3: 2 steps + 1 step + 1 step
    Option 4: 1 step + 2 steps + 1 step
    Option 5: 2 steps + 2 steps

Last date to submit the solution 23:59 (UK Time) Sunday 16th May 2021.