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#!/usr/bin/perl -s
use v5.24;
use Test2::V0 '!float';
use PDL;
use PDL::NiceSlice;
use Math::Prime::Util 'divisors';
our ($tests, $examples);
run_tests() if $tests || $examples; # does not return
die <<EOS unless @ARGV;
usage: $0 [-examples] [-tests] [I...]
-examples
run the examples from the challenge
-tests
run some tests
I...
list of integers
EOS
### Input and Output
say snss(@ARGV);
### Implementation
sub snss {
sum pdl(@_)->(indx(divisors @_) - 1) ** 2
}
### Examples and tests
sub run_tests {
SKIP: {
skip "examples" unless $examples;
is snss(1, 2, 3, 4), 21, 'example 1';
is snss(2, 7, 1, 19, 18, 3), 63, 'example 2';
}
SKIP: {
skip "tests" unless $tests;
is snss(-1, -2), 5, 'negative values';
}
done_testing;
exit;
}
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