add day12 outline

day12.go

@@ -0,0 +1,13 @@
+package main
+
+import "io"
+
+type day12 struct{}
+
+func (d day12) solve1(r io.Reader) string {
+	return "incomplete"
+}
+
+func (d day12) solve2(r io.Reader) string {
+	return "incomplete"
+}

main.go

@@ -31,6 +31,7 @@ var (
 		&day09{},
 		&day10{},
 		&day11{},
+		&day12{},
 	}
 )
 

main_test.go

@@ -191,5 +191,15 @@ ZZZ = (ZZZ, ZZZ)`,
     		       #...#.....`,
 			ans1: "374",
 		},
+		{
+			// day 12
+			inp1: `???.### 1,1,3
+    		       .??..??...?##. 1,1,3
+    		       ?#?#?#?#?#?#?#? 1,3,1,6
+    		       ????.#...#... 4,1,1
+    		       ????.######..#####. 1,6,5
+    		       ?###???????? 3,2,1`,
+			ans1: "21",
+		},
 	}
 )