54 lines
805 B
Go
54 lines
805 B
Go
|
package main
|
||
|
|
|
||
|
|
import (
|
||
|
|
"bufio"
|
||
|
|
"fmt"
|
||
|
|
"log"
|
||
|
|
"os"
|
||
|
|
"strings"
|
||
|
|
"strconv"
|
||
|
|
)
|
||
|
|
|
||
|
|
var vertical int = 0
|
||
|
|
var horizontal int = 0
|
||
|
|
func checkErr(e error){
|
||
|
|
if e != nil{
|
||
|
|
log.Fatal(e)
|
||
|
|
panic(e)
|
||
|
|
}
|
||
|
|
}
|
||
|
|
func main(){
|
||
|
|
f, err:=os.Open("input")
|
||
|
|
checkErr(err)
|
||
|
|
defer f.Close()
|
||
|
|
scanner := bufio.NewScanner(f)
|
||
|
|
for scanner.Scan(){
|
||
|
|
evalCommand(scanner.Text())
|
||
|
|
}
|
||
|
|
|
||
|
|
fmt.Println(horizontal*vertical)
|
||
|
|
|
||
|
|
}
|
||
|
|
func evalCommand(c string){
|
||
|
|
s := strings.Split(c," ")
|
||
|
|
|
||
|
|
switch s[0]{
|
||
|
|
case "forward":
|
||
|
|
s,err := strconv.Atoi(s[1])
|
||
|
|
checkErr(err)
|
||
|
|
horizontal = horizontal+s
|
||
|
|
case "backward":
|
||
|
|
s,err := strconv.Atoi(s[1])
|
||
|
|
checkErr(err)
|
||
|
|
horizontal = horizontal-s
|
||
|
|
case "up":
|
||
|
|
s,err := strconv.Atoi(s[1])
|
||
|
|
checkErr(err)
|
||
|
|
vertical=vertical-s
|
||
|
|
case "down":
|
||
|
|
s,err := strconv.Atoi(s[1])
|
||
|
|
checkErr(err)
|
||
|
|
vertical=vertical+s
|
||
|
|
}
|
||
|
|
}
|