Started working on day 17

2018/day13/day13.go

@@ -42,8 +42,11 @@ func part1() {
 	}
 }
 
+var ticks int
+
 func part2() {
 	for len(cartMap) > 1 {
+		ticks++
 		sort.Sort(ByPos(carts))
 		for _, c := range carts {
 			if *c != 0 {
@@ -54,6 +57,7 @@ func part2() {
 	for pos := range cartMap {
 		fmt.Printf("🔵: %0.0f,%0.0f\n", real(pos), imag(pos))
 	}
+	fmt.Println("Ticks: ", ticks)
 }
 
 type Cart struct {
@@ -69,7 +73,7 @@ func (c *Cart) tick() bool {
 	delete(cartMap, c.pos)
 	c.pos += c.dir
 	if cart, ok := cartMap[c.pos]; ok {
-		fmt.Printf("❌: %0.0f,%0.0f\n", real(c.pos), imag(c.pos))
+		fmt.Printf("❌: %0.0f,%0.0f (%d ticks)\n", real(c.pos), imag(c.pos), ticks)
 		// Remove the cart we crashed into from the map
 		delete(cartMap, c.pos)
 		// And clear the cart's pos, we can ignore them now