1 files changed, 14 insertions, 0 deletions
diff --git a/day19.k b/day19.k
new file mode 100644
index 0000000..4626560
--- /dev/null
+++ b/day19.k
@@ -0,0 +1,14 @@
+/ use k-3.2
+ss:{1 _' (&y=y,x) _ y,x}; / split x at y
+l:{ss[x;" "]@0 2}' -2 _ 0:"day19";
+s:*|0:"day19";
+
+ssall:{[x;y;z]{[n](n#x),z,(n+#y) _ x}' x _ss y} / all substitutions
+
+#?,/{ssall[s;x@0;x@1]}'l / part 1
+
+step1:{[s],/{ssall[s;x@1;x@0]}'l}
+lim:{:[100<#x;100#x;x]}
+c:0
+{c+:1;r:?,/step1'x;lim@r@<#:'r}/[#:;,s];
+c-1 / part 2