I'm getting the same wrong output in Perl 5.28.1 which is the version Code Jam
uses. I noticed both 5.26.1 and 5.33.7 (the other versions available to me)
gave the correct answer, so I tried to bisect it. The bug was introduced in
https://github.com/Perl/perl5/commit/2813d4adc971fbaa124b5322d4bccaa73e9df8e2
and fixed in
https://github.com/Perl/perl5/commit/1d8aafa0548097ffe407cad078f79b4d56fd7dca
which means only 5.28.* had this problem.
Ch.
==============================================================================
On Thu, 15 Apr 2021, Neil Agarwal wrote:
Hi all,
Could someone please explain to me the output of the following Perl code in
Code Jam's test run mode? The system gives "BCD" instead of "ABCD", and I
have not been able to reproduce this behavior anywhere else.
$S1 = "1((((((7(9))))))";
$S2 = "1((((((7(9)))))";
print "A" if $S1 =~ /[89]+/;
print "B" if $S1 =~ /[9]+/;
print "C" if $S2 =~ /[89]+/;
print "D" if $S2 =~ /[9]+/;
FWIW, I was having trouble getting my solution to the "Nesting Depth"
problem from the 2020 Qualification Round accepted, and eventually narrowed
it down to this.
https://codingcompetitions.withgoogle.com/codejam/round/000000000019fd27/0000000000209a9f
Thank you!
Neil
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