add day-13 + benchmarks

day-13/internal/machine/machine.go

@@ -0,0 +1,39 @@
+package machine
+
+import "fmt"
+
+type Button struct {
+	X int
+	Y int
+}
+
+type Prize struct {
+	X int
+	Y int
+}
+
+type Machine struct {
+	A     Button
+	B     Button
+	Prize Prize
+}
+
+func New(btnA, btnB, prz []string) *Machine {
+	return &Machine{
+		A:     Button{X: mustConv(btnA[2]), Y: mustConv(btnA[3])},
+		B:     Button{X: mustConv(btnB[2]), Y: mustConv(btnB[3])},
+		Prize: Prize{X: mustConv(prz[1]), Y: mustConv(prz[2])},
+	}
+}
+
+func (m *Machine) String() string {
+	return fmt.Sprintf(
+		"ButtonA: (%d,%d) ButtonB: (%d,%d) Prize: (%d,%d)",
+		m.A.X,
+		m.A.Y,
+		m.B.X,
+		m.B.Y,
+		m.Prize.X,
+		m.Prize.Y,
+	)
+}

day-13/internal/machine/util.go

@@ -0,0 +1,11 @@
+package machine
+
+import "strconv"
+
+func mustConv(s string) int {
+	n, err := strconv.Atoi(s)
+	if err != nil {
+		panic(err)
+	}
+	return n
+}