Add TWC 206 solutions by Bruce Gray (Raku only).

2 files changed, 34 insertions, 0 deletions

diff --git a/challenge-206/bruce-gray/raku/ch-1.raku b/challenge-206/bruce-gray/raku/ch-1.raku
new file mode 100644
index 0000000000..71a9fc7d2c
--- /dev/null
+++ b/challenge-206/bruce-gray/raku/ch-1.raku
@@ -0,0 +1,19 @@
+sub task1 (@hhmm --> UInt) {
+    return @hhmm
+        .map({ .[0] * 60 + .[1]       given .split(':')   })
+        .combinations(2)
+        .map({ ( $_, 1440 - $_ ).min  given abs [-] .list })
+        .min;
+}
+
+
+constant @tests =
+    ( <00:00 23:55 20:00>       ,  5 ),
+    ( <01:01 00:50 00:57>       ,  4 ),
+    ( <10:10 09:30 09:00 09:55> , 15 ),
+;
+use Test;
+plan +@tests;
+for @tests -> ( $in, $expected ) {
+    is task1($in), $expected;
+}
diff --git a/challenge-206/bruce-gray/raku/ch-2.raku b/challenge-206/bruce-gray/raku/ch-2.raku
new file mode 100644
index 0000000000..8f201f5c43
--- /dev/null
+++ b/challenge-206/bruce-gray/raku/ch-2.raku
@@ -0,0 +1,15 @@
+sub task2 ( @ns where { .elems %% 2 }--> UInt ) {
+    # return @ns.permutations.map({ .batch(2)».min.sum }).max; # Brute force
+    return @ns.sort(+*).batch(2)».[0].sum;  # Maximize sum by minimizing the gaps inside each pairing.
+}
+
+
+constant @tests =
+    ( (1,2,3,4), 4 ),
+    ( (0,2,1,3), 2 ),
+;
+use Test;
+plan +@tests;
+for @tests -> ( $in, $expected ) {
+    is task2($in), $expected;
+}