Challenge 151 Solutions (Raku)

2 files changed, 9 insertions, 6 deletions

diff --git a/challenge-151/mark-anderson/raku/ch-1.raku b/challenge-151/mark-anderson/raku/ch-1.raku
index 4797264da4..2e4c45274c 100644
--- a/challenge-151/mark-anderson/raku/ch-1.raku
+++ b/challenge-151/mark-anderson/raku/ch-1.raku
@@ -4,18 +4,17 @@ use Test;
 
 is binary-tree-depth('1 | 2 3 | 4 5'), 2;
 is binary-tree-depth('1 | 2 3 | 4 * * 5 | * 6'), 3;
-is binary-tree-depth('1 | 2 3 | 4 * * 5 | 6 * * 7 | 8 * * 9 | 10 *'), 5;
 
 sub binary-tree-depth($str)
 {
     my $tree := $str.split(/\s\|\s/).map(*.split(/\s/));
-    my $elems = 1;
-    my $depth = 0;
+    my $nodes = 1;
+    my $depth;
 
-    for $tree -> $nodes
+    for $tree -> $elems
     {
-        last unless $nodes.elems == $elems;
-        $elems = ($elems - $nodes.comb('*')) * 2;
+        last unless $elems == $nodes;
+        $nodes = ($nodes - $elems.comb('*')) * 2;
         $depth++;
     }
 
diff --git a/challenge-151/mark-anderson/raku/ch-2.raku b/challenge-151/mark-anderson/raku/ch-2.raku
index b725a2b196..b086b7653a 100644
--- a/challenge-151/mark-anderson/raku/ch-2.raku
+++ b/challenge-151/mark-anderson/raku/ch-2.raku
@@ -2,6 +2,10 @@
 
 # With help from https://www.geeksforgeeks.org/find-maximum-possible-stolen-value-houses/
 
+# I may have misunderstood the problem. At first I thought we have to rob the
+# first house but then I thought we just have to start at the first house and
+# consider robbing it. I went with my second instinct.
+
 use Test;
 
 is rob(2, 4, 5), 7;