02: part1+2

2/part1.go

@@ -0,0 +1,31 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strconv"
+	"strings"
+)
+
+func main() {
+	depth := 0
+	position := 0
+
+	s := bufio.NewScanner(os.Stdin)
+	for s.Scan() {
+		tokens := strings.Split(s.Text(), " ")
+		direction := tokens[0]
+		value, _ := strconv.Atoi(tokens[1])
+		switch direction {
+		case "forward":
+			position += value
+		case "up":
+			depth -= value
+		case "down":
+			depth += value
+		}
+	}
+
+	fmt.Println(depth * position)
+}

2/part2.go

@@ -0,0 +1,33 @@
+package main
+
+import (
+	"bufio"
+	"fmt"
+	"os"
+	"strconv"
+	"strings"
+)
+
+func main() {
+	depth := 0
+	position := 0
+	aim := 0
+
+	s := bufio.NewScanner(os.Stdin)
+	for s.Scan() {
+		tokens := strings.Split(s.Text(), " ")
+		direction := tokens[0]
+		value, _ := strconv.Atoi(tokens[1])
+		switch direction {
+		case "forward":
+			position += value
+			depth += aim * value
+		case "up":
+			aim -= value
+		case "down":
+			aim += value
+		}
+	}
+
+	fmt.Println(depth * position)
+}