solutions week 169

2 files changed, 50 insertions, 0 deletions

diff --git a/challenge-169/wambash/raku/ch-1.raku b/challenge-169/wambash/raku/ch-1.raku
new file mode 100644
index 0000000000..7109be4bee
--- /dev/null
+++ b/challenge-169/wambash/raku/ch-1.raku
@@ -0,0 +1,25 @@
+#!/usr/bin/env raku
+
+sub brilliant-numbers (UInt $n) {
+   10 ** $n ^..^ 10** ($n+1)
+   andthen .grep: *.is-prime
+   andthen .cache
+   andthen |.combinations(2), |($_ Z, $_)
+   andthen .map: {[*] $_}\
+   andthen .sort
+   andthen .Slip
+}
+
+constant BrilliantNumbers = (0..Inf).map: &brilliant-numbers;
+
+multi MAIN (Bool :test($)!) {
+    use Test;
+    is brilliant-numbers(0), <4 6 9 10 14 15 21 25 35 49>;
+    is brilliant-numbers(1).head(10), (121, 143, 169, 187, 209, 221, 247, 253, 289, 299);
+    is BrilliantNumbers.head(20), (4, 6, 9, 10, 14, 15, 21, 25, 35, 49, 121, 143, 169, 187, 209, 221, 247, 253, 289, 299);
+    done-testing;
+}
+
+multi MAIN (UInt $n=20) {
+    put BrilliantNumbers.head: $n
+}
diff --git a/challenge-169/wambash/raku/ch-2.raku b/challenge-169/wambash/raku/ch-2.raku
new file mode 100644
index 0000000000..6f70147d33
--- /dev/null
+++ b/challenge-169/wambash/raku/ch-2.raku
@@ -0,0 +1,25 @@
+#!/usr/bin/env raku
+use Prime::Factor;
+
+sub is-Achilles ($n) {
+    prime-factors $n
+    andthen bag $_
+    andthen .values.cache
+    andthen (.all > 1) & (1 == [gcd] $_)
+    andthen .so
+}
+
+constant Achilles = (2..∞).grep: &is-Achilles;
+multi MAIN (Bool :test($)!) {
+    use Test;
+    is is-Achilles(72),True;
+    is is-Achilles(36),False;
+    is is-Achilles(1568),True;
+    is is-Achilles(1668),False;
+    is Achilles.head(20),(72, 108,  200,  288,  392,  432,  500,  648,  675,  800,  864, 968, 972, 1125, 1152, 1323, 1352, 1372, 1568, 1800);
+    done-testing;
+}
+
+multi MAIN (UInt $n=20) {
+    put Achilles.head: $n
+}