PWC 371 Subset Equilibrium (Just nod if you can hear me)

A Perl function sseq is designed to find subsets of a given list where the sum of elements equals the sum of their corresponding indices plus one. The solution uses the Algorithm::Combinatorics module for generating combinations and List::Util for summation.

Key Steps:

1. Generate Subsets: Use an iterator from Algorithm::Combinatorics to generate all possible subsets of positions.
2. Calculate Sums:
   • Calculate the sum of indices (adjusted by adding 1 since they are zero-indexed).
   • Calculate the sum of elements at those indices using a hash slice.
3. Check Equality: Compare both sums and collect matching subsets.

Implementation Details:

• The function returns an array reference containing references to arrays that represent valid subsets.
• Unit tests use Test2::V0 and Test2::Tools::Compare for verifying the correctness of results, ignoring order.
• Output formatting is handled by mapping over the result set to create human-readable strings.

Example Usage:

perl
 
1use Algorithm::Combinatorics qw/subsets/;
2use List::Util qw/sum0/;
3
4sub sseq {
5    my @nums = @_;
6
7[Read the full article at DEV Community](https://dev.to/boblied/pwc-371-subset-equilibrium-just-nod-if-you-can-hear-me-14im)
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