Day 15: Part 2

Signed-off-by: James Griffin <james@unsupervised.ca>

fifteen/day_fifteen.go

@@ -81,3 +81,13 @@ func PartOne() string {
 
 	return fmt.Sprintf("The 2020th number is %d", g.valueAt(2020))
 }
+
+// PartTwo What is the 30000000th number given my input
+func PartTwo() string {
+	g := game{}
+	if err := g.load("fifteen/input.txt"); err != nil {
+		return err.Error()
+	}
+
+	return fmt.Sprintf("The 30000000th number is %d", g.valueAt(30000000))
+}

fifteen/day_fifteen_test.go

@@ -43,3 +43,18 @@ func Test_get_guess2(t *testing.T) {
 	}
 }
 
+func Test_get_guess3(t *testing.T) {
+	g := game{}
+	if err := g.load("sample.txt"); err != nil {
+		t.Logf(err.Error())
+		t.FailNow()
+	}
+
+	r := g.valueAt(30000000)
+	if r != 175594 {
+		t.Logf("Expected 175594, but got %d", r)
+		t.FailNow()
+	}
+}
+
+

main.go

@@ -65,4 +65,5 @@ func main() {
 
 	// Day 15
 	fmt.Println(fifteen.PartOne())
+	fmt.Println(fifteen.PartTwo())
 }