solutions week 121

2 files changed, 44 insertions, 0 deletions

diff --git a/challenge-121/wambash/raku/ch-1.raku b/challenge-121/wambash/raku/ch-1.raku
new file mode 100644
index 0000000000..6772d1f0be
--- /dev/null
+++ b/challenge-121/wambash/raku/ch-1.raku
@@ -0,0 +1,16 @@
+#!/usr/bin/env raku
+
+sub invert-bit ($m, $n) {
+    $m +^ 2**($n-1)
+}
+
+multi MAIN ($m, $n) {
+    say invert-bit $m, $n
+}
+
+multi MAIN (Bool :test($)!) {
+    use Test;
+    is invert-bit(12,3), 8;
+    is invert-bit(18,4), 26;
+    done-testing;
+}
diff --git a/challenge-121/wambash/raku/ch-2.raku b/challenge-121/wambash/raku/ch-2.raku
new file mode 100644
index 0000000000..66402c9825
--- /dev/null
+++ b/challenge-121/wambash/raku/ch-2.raku
@@ -0,0 +1,28 @@
+#!/usr/bin/env raku
+
+sub the-traveling-salesman (@n) {
+    permutations(@n.end)
+    andthen .race
+    andthen .map: { @n.end, |$_, @n.end }\
+    andthen .map: { .rotor(2=>- 1) => $_ }\
+    andthen .map: { .key.map( -> ($x,$y){@n[$x;$y]}).sum => .value }\
+    andthen .min
+}
+
+multi MAIN (Bool :test($)!) {
+    use Test;
+    my @n := [
+        [0, 5, 2, 7],
+        [5, 0, 5, 3],
+        [3, 1, 0, 6],
+        [4, 5, 4, 0],
+    ];
+    is-deeply the-traveling-salesman(@n), 10 => (3,0,2,1,3);
+    done-testing;
+}
+
+multi MAIN ($n) {
+    my @n=(1 ..^ 100).roll($n) xx $n;
+    say @n.fmt: '%2d',"\n";
+    say the-traveling-salesman(@n);
+}