2015-day01

2015/day01/main.go

@@ -0,0 +1,35 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+
+	"github.com/alexchao26/advent-of-code-go/util"
+)
+
+func main() {
+	var part int
+	flag.IntVar(&part, "part", 1, "part 1 or 2")
+	flag.Parse()
+	fmt.Println("Running part", part)
+
+	ans := notQuiteLisp(util.ReadFile("./input.txt"), part)
+	fmt.Println("Output:", ans)
+}
+
+func notQuiteLisp(input string, part int) int {
+	var level int
+	for i, r := range input {
+		if r == '(' {
+			level++
+		} else {
+			level--
+		}
+
+		if part == 2 && level == -1 {
+			return i + 1
+		}
+	}
+
+	return level
+}

2015/day01/main_test.go

@@ -0,0 +1,26 @@
+package main
+
+import (
+	"testing"
+
+	"github.com/alexchao26/advent-of-code-go/util"
+)
+
+func Test_notQuiteLisp(t *testing.T) {
+	tests := []struct {
+		name  string
+		input string
+		part  int
+		want  int
+	}{
+		{"actual", util.ReadFile("input.txt"), 1, 232},
+		{"actual", util.ReadFile("input.txt"), 2, 1783},
+	}
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			if got := notQuiteLisp(tt.input, tt.part); got != tt.want {
+				t.Errorf("notQuiteLisp() = %v, want %v", got, tt.want)
+			}
+		})
+	}
+}