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#!/usr/bin/perl -s
use v5.24;
use Test2::V0;
use experimental 'signatures';
our ($tests, $examples);
run_tests() if $tests || $examples; # does not return
die <<EOS unless @ARGV > 1;
usage: $0 [-examples] [-tests] [--] [START N...]
-examples
run the examples from the challenge
-tests
run some tests
START
starting value
N...
list of numbers
EOS
### Input and Output
say mb2(@ARGV);
### Implementation
sub mb2 ($start, @ints) {
my $p = 0;
for my $i (@ints) {
next if $i % $start;
my $c = $i / $start;
$p |= $c unless $c & ($c - 1);
}
$start * (($p + 1) & ~$p);
}
### Examples and tests
sub run_tests {
SKIP: {
skip "examples" unless $examples;
is mb2(3 ,=> 5,3,6,1,12), 24, 'example 1';
is mb2(1 ,=> 1,2,4,3), 8, 'example 2';
is mb2(2 ,=> 5,6,7), 2, 'example 3';
}
SKIP: {
skip "tests" unless $tests;
is mb2(3 ,=> 6, 12, 1, 2), 3, 'none found';
is mb2(3 ,=> 3, 0), 6, 'has zero';
is mb2(-3 ,=> -3, -6), -12, 'negative';
is mb2(2 ,=> 2, 4, 8), 16, 'powers of two';
is mb2(3 ,=> 3, 9), 6, 'not a power of two';
is mb2(5 ,=> 0, 1, 2, 3, 4), 5, 'zero only';
is mb2(5 ,=> 1, 2, 3, 4), 5, 'empty target list';
}
done_testing;
exit;
}
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