45 lines
613 B
Go
45 lines
613 B
Go
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package main
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import (
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"bufio"
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"fmt"
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"log"
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"os"
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"strconv"
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"strings"
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)
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func main() {
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f, err := os.Open("input")
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if err != nil {
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log.Fatalf("%+v", err)
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}
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defer f.Close()
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scanner := bufio.NewScanner(f)
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scanner.Split(bufio.ScanLines)
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aim := 0
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pos := 0
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depth := 0
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for scanner.Scan() {
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elts := strings.Split(scanner.Text(), " ")
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i, err := strconv.Atoi(elts[1])
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if err != nil {
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log.Fatalf("%+v", err)
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}
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switch elts[0] {
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case "forward":
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pos += i
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depth += i * aim
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case "down":
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aim += i
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case "up":
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aim -= i
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default:
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panic(elts[0])
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}
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}
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fmt.Println(pos * depth)
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}
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