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#!/usr/bin/env perl6
use v6.c;
multi sub MAIN(*@) is hidden-from-USAGE {
say $*USAGE;
say "\nERROR: Invalid binary string !!!";
}
multi sub MAIN(Str :$binary-str where { m/^ <[01]>+ $/ }) {
say ($binary-str, flip-binary($binary-str)).join(" => ");
}
sub flip-binary(Str $binary-str) {
my %result;
my $size = $binary-str.chars;
for 1 .. $size -> $left {
for $left .. $size -> $right {
my $_binary-str = $binary-str;
for $left .. $right -> $i is copy {
--$i;
my $c = $_binary-str.substr($i, 1);
$c = ($c eq "1") ?? (0) !! (1);
$_binary-str.substr-rw($i, 1) = $c;
}
my $k = sprintf("%s (%s,%s)", $_binary-str, $left, $right);
my $v = $_binary-str.comb("1").elems;
%result{$k} = $v;
}
}
return flipped-binary(%result);
}
sub flipped-binary(%result) {
my Int $value;
my @r;
for %result.sort({ $^b.value <=> $^a.value || $^a.key cmp $^b.key }) -> $pair {
my $_k = $pair.keys;
my $_v = $pair.values.Str.Int;
if defined $value {
if $_v == $value {
push @r, $_k;
}
}
else {
$value = $_v;
push @r, $_k;
}
}
return @r.join(" | ");
}
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