The Weekly Challenge

09. TASK #1: Arithmetic Triplets

HEADLINES

Welcome to the Week #241 of The Weekly Challenge.

Last week, I shared a report by rcmlz about Raku Benchmark Scabality. It created buzz among Team PWC members. It is always nice to hear positive response. Unfortunately I didn’t get the report for the Week #240.

Last 5 weeks mainstream contribution stats. Thank you Team PWC for your support and encouragements.


`Week`	`Perl`	`Raku`	`Blog`
`236`	51	34	29
`237`	48	34	26
`238`	60	37	29
`239`	59	41	28
`240`	62	36	26

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`Week`	`Guests`	`Contributions`	`Languages`
`236`	14	62	20
`237`	14	54	16
`238`	15	79	24
`239`	20	84	24
`240`	18	89	26

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Blogs with Creative Title

1. ABA (Acronym Build Array) by Adam Russell.

2. An Attempt to Simplify Fails, But Works by Augie De Blieck Jr.

3. Acronymous Array by Arne Sommer.

4. Just a slice. No loop, please. I’ll eat it here. by Bob Lied.

5. A.A.B.A. (Acronym And Build Array) by Ian Rifkin.

6. Short Acronyms, and Short Solutions by Matthias Muth.

7. Building Acronym Arrays by Packy Anderson.

8. Initialisms and contorted arrays by Peter Campbell Smith.

9. Building Acronyms by Roger Bell_West.

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RECAP

Quick recap of The Weekly Challenge - 240 by Mohammad S Anwar.

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Task 1: Arithmetic Triplets

Submitted by: Mohammad S Anwar

You are given an array (3 or more members) of integers in increasing order and a positive integer.

Write a script to find out the number of unique Arithmetic Triplets satisfying the following rules:

a) i < j < k
b) nums[j] - nums[i] == diff
c) nums[k] - nums[j] == diff

Example 1

Input: @nums = (0, 1, 4, 6, 7, 10)
       $diff = 3
Output: 2

Index (1, 2, 4) is an arithmetic triplet because both  7 - 4 == 3 and 4 - 1 == 3.
Index (2, 4, 5) is an arithmetic triplet because both 10 - 7 == 3 and 7 - 4 == 3.

Example 2

Input: @nums = (4, 5, 6, 7, 8, 9)
       $diff = 2
Output: 2

(0, 2, 4) is an arithmetic triplet because both 8 - 6 == 2 and 6 - 4 == 2.
(1, 3, 5) is an arithmetic triplet because both 9 - 7 == 2 and 7 - 5 == 2.

Task 2: Prime Order

Submitted by: Mohammad S Anwar

You are given an array of unique positive integers greater than 2.

Write a script to sort them in ascending order of the count of their prime factors, tie-breaking by ascending value.

Example 1

Input: @int = (11, 8, 27, 4)
Output: (11, 4, 8, 27))

Prime factors of 11 => 11
Prime factors of  4 => 2, 2
Prime factors of  8 => 2, 2, 2
Prime factors of 27 => 3, 3, 3

Last date to submit the solution 23:59 (UK Time) Sunday 5th November 2023.