Perl solution.
Just remove all the {}s until there's nothing to remove. If you got an empty string, the input was valid.
{}
#!/usr/bin/perl use warnings; use strict; sub are_curly_braces_matched { my ($s) = @_; 1 while $s =~ s/{}//g; return ! length $s } use Test::More tests => 4; ok are_curly_braces_matched('{{{}{}}}'); ok ! are_curly_braces_matched('{{'); ok ! are_curly_braces_matched('{}}'); ok are_curly_braces_matched("");
Are you sure you want to hide this comment? It will become hidden in your post, but will still be visible via the comment's permalink.
Hide child comments as well
Confirm
For further actions, you may consider blocking this person and/or reporting abuse
We're a place where coders share, stay up-to-date and grow their careers.
Perl solution.
Just remove all the
{}
s until there's nothing to remove. If you got an empty string, the input was valid.