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#!/opt/perl/bin/perl
use 5.032;
use strict;
use warnings;
no warnings 'syntax';
use experimental 'signatures';
use experimental 'lexical_subs';
#
# See ../README.md
#
#
# Run as: perl ch-2.pl < input-file
#
#
# For a description of the algorithm, see
# https://abigail.github.io/HTML/Perl-Weekly-Challenge/week-114-2.html
#
say oct sprintf ("0b0%b" => $_) =~ s {01(1*)(0*)$} {10$2$1}r while <>;
__END__
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