Hey
I misread the definition of substring to mean all substrings of that length or lower...quick easy fix and it starts placing decent.
sub common_sub {
my ($s1,$s2,$len) = @_;
my $len_s1 = length($s1);
my $len_s2 = length($s2);
my $match_s1 = {};
my $match_s2 = {};
for my $start (0..length($s1)-1) {
#for my $l (1..$len) {
next if $start+$len > $len_s1;
$match_s1->{substr($s1, $start, $len)} ||= 1;
#}
}
for my $start (0..length($s2)-1) {
#for my $l (1..$len) {
next if $start+$len > $len_s2;
$match_s2->{substr($s2, $start, $len)} ||= 1;
#}
}
$match_s1->{$_}++ for keys %$match_s2;
return grep { $match_s1->{$_} == 2 } keys %$match_s1;
}
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