Task 1 done

1 files changed, 34 insertions, 0 deletions

diff --git a/challenge-200/luca-ferrari/raku/ch-1.p6 b/challenge-200/luca-ferrari/raku/ch-1.p6
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+#!raku
+
+#
+# Perl Weekly Challenge 200
+# Task 1
+#
+# See <https://perlweeklychallenge.org/blog/perl-weekly-challenge-200/>
+#
+
+sub MAIN( *@list where { @list.elems == @list.grep( * ~~ Int ).elems } ) {
+    my @slices;
+
+    for 0 ^..^ @list.elems - 1 -> $center {
+	for 1 .. $center {
+	    my ( $start, $end ) = $center - $_, $center + $_;
+	    $start = 0 if $start < 0;
+	    $end = @list.elems - 1 if $end >= @list.elems;
+
+	    my @seeking = @list[ $start .. $end ];
+	    my $ok = @list.elems >= 3;
+	    for 1 ..^ @seeking.elems {
+		state $difference = @seeking[ $_ ] - @seeking[ $_ - 1 ];
+		$ok = False and last if @seeking[ $_ ] - @seeking[ $_ - 1 ] != $difference;
+	    }
+
+	    @slices.push: @seeking if $ok;
+	}
+    }
+
+    @slices.join( "\n" ).say;
+
+
+
+}