solutions week 137

2 files changed, 46 insertions, 0 deletions

diff --git a/challenge-137/wambash/raku/ch-1.raku b/challenge-137/wambash/raku/ch-1.raku
new file mode 100644
index 0000000000..4c8a578612
--- /dev/null
+++ b/challenge-137/wambash/raku/ch-1.raku
@@ -0,0 +1,25 @@
+#!/usr/bin/env raku
+
+enum DOW (Thursday => 4);
+
+sub is-long-year ($year ) {
+    | Date.new( :$year )
+    | Date.new( year => $year+1)-1
+    andthen   .day-of-week == Thursday
+}
+
+multi MAIN () {
+    1900 .. 2100
+    andthen Supply.from-list: $_
+    andthen .grep: &is-long-year
+    andthen .batch: :5elems
+    andthen .map: *.fmt: '%4d', ', '
+    andthen .tap: *.say;
+}
+
+multi MAIN (Bool :test($)!) {
+    use Test;
+    ok is-long-year( $_ )   for 1903, 2032, 2099;
+    nok is-long-year( $_ )  for 1901, 2033, 2098;
+    done-testing;
+}
diff --git a/challenge-137/wambash/raku/ch-2.raku b/challenge-137/wambash/raku/ch-2.raku
new file mode 100644
index 0000000000..c6df1ad300
--- /dev/null
+++ b/challenge-137/wambash/raku/ch-2.raku
@@ -0,0 +1,21 @@
+#!/usr/bin/env raku
+
+
+sub is-Lychrel-number ($n) {
+    $n, {$_ + .flip} ... * >= 10_000_000
+    andthen .head: 500
+    andthen not .first: {$_ eq .flip}, :p
+}
+
+multi MAIN ($n) {
+    say +is-Lychrel-number $n
+}
+
+multi MAIN (Bool :test($)!) {
+    use Test;
+    nok is-Lychrel-number(56);
+    nok is-Lychrel-number(57);
+    nok is-Lychrel-number(59);
+    ok is-Lychrel-number(196);
+    done-testing;
+}