Solutions for #156

2 files changed, 19 insertions, 0 deletions

diff --git a/challenge-156/2colours/raku/ch-1.raku b/challenge-156/2colours/raku/ch-1.raku
new file mode 100755
index 0000000000..c132c1ab02
--- /dev/null
+++ b/challenge-156/2colours/raku/ch-1.raku
@@ -0,0 +1,4 @@
+#!/usr/bin/env raku
+
+
+(^Inf).grep(*.base(2).comb.sum.is-prime).head(10).say;
\ No newline at end of file
diff --git a/challenge-156/2colours/raku/ch-2.raku b/challenge-156/2colours/raku/ch-2.raku
new file mode 100755
index 0000000000..a1d48e4f6d
--- /dev/null
+++ b/challenge-156/2colours/raku/ch-2.raku
@@ -0,0 +1,15 @@
+#!/usr/bin/env raku
+
+
+multi prime-factors(1) { Bag() }
+multi prime-factors($n where *.is-prime) { Bag($n) }
+multi prime-factors($n) { (2..sqrt $n).first: $n %% * andthen $_ (+) prime-factors($n div $_)}
+
+sub is-weird($n) {
+  when $n == 0|1 { False }
+  my @proper-divisors = prime-factors($n).kxxv.combinations.map(*.reduce: &[*]).unique.grep: * != $n;
+  @proper-divisors.combinations.map(&sum).categorize(* cmp $n) andthen .{Same, More}:exists eqv (False, True);
+}
+
+my $n = prompt 'Input: $n = ';
+say "Output: {is-weird($n).Int}";