2 files changed, 40 insertions, 0 deletions
diff --git a/challenge-127/wambash/raku/ch-1.raku b/challenge-127/wambash/raku/ch-1.raku
new file mode 100644
index 0000000000..a8084942e1
--- /dev/null
+++ b/challenge-127/wambash/raku/ch-1.raku
@@ -0,0 +1,20 @@
+#!/usr/bin/env raku
+
+sub disjoint-set (Set() \M, Set() \N) {
+    M ∩ N ≡ ∅
+}
+
+multi MAIN () {
+    lines()
+    andthen .map: *.words
+    andthen disjoint-set(|.head(2))
+    andthen .say
+}
+
+multi MAIN (Bool :test($)!) {
+     use Test;
+     nok disjoint-set( (1,2,5,3,4), (4,6,7,8,9) );
+     ok  disjoint-set( (1,3,5,7,9), (0,2,4,6,8) );
+     done-testing;
+}
+
diff --git a/challenge-127/wambash/raku/ch-2.raku b/challenge-127/wambash/raku/ch-2.raku
new file mode 100644
index 0000000000..fd7e771ba6
--- /dev/null
+++ b/challenge-127/wambash/raku/ch-2.raku
@@ -0,0 +1,20 @@
+#!/usr/bin/env raku
+
+sub conflict-intervals ( +@intervals ) {;
+    @intervals.grep: -> $r { @intervals.head($++).first: $r.bounds.any ~~ * }
+}
+
+multi MAIN (*@r) { #= A C  B D  F H  E G
+     @r
+     andthen .map: -> $s, $e { $s .. $e }\
+     andthen conflict-intervals $_
+     andthen .say
+}
+
+multi MAIN (Bool :test($)!) {
+     use Test;
+     is-deeply conflict-intervals( 1..4, 3..5, 6..8, 12..13, 3..20), (3..5, 3..20);
+     is-deeply conflict-intervals( 3..4, 5..7, 6..9, 10..12), (6..9,);
+     is-deeply conflict-intervals( 3..4, 5..7, 6..9, 10..14, 13..15 ), (6..9, 13..15);
+     done-testing;
+}