1 files changed, 19 insertions, 0 deletions
diff --git a/challenge-075/feng-chang/raku/ch-1.raku b/challenge-075/feng-chang/raku/ch-1.raku
new file mode 100755
index 0000000000..2cfd88dfb6
--- /dev/null
+++ b/challenge-075/feng-chang/raku/ch-1.raku
@@ -0,0 +1,19 @@
+#!/bin/env raku
+
+sub coins-sum(Int:D @C, Int:D $S, Int:D @solution) {
+    { say @solution; return; } if $S == 0;
+    return if $S < @C[0];
+
+    my Int @coins = @C;
+    while @coins.elems > 0 {
+        my Int @Sol = @solution;
+        @Sol.push(@coins[0]);
+        coins-sum(@coins, $S - @coins[0], @Sol);
+
+        @coins.shift;
+    }
+}
+
+my Int @coins = 1, 2, 4;
+my Int @solution;
+coins-sum(@coins, 6, @solution);