109 lines
2.2 KiB
Go
109 lines
2.2 KiB
Go
package main
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import (
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"bufio"
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"fmt"
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"io"
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"os"
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"container/list"
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)
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type Coord struct {
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x int
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y int
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}
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func coordDansListe(l *list.List, e Coord) (bool) {
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var tmp Coord
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for elem := l.Front(); elem != nil; elem = elem.Next() {
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tmp = Coord(elem.Value.(Coord))
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if tmp.x == e.x && tmp.y == e.y {
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return true
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}
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}
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return false
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}
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func nouvCoord(l *list.List, c string, pred Coord) (Coord, bool) {
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ret := false
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switch c {
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case "^":
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pred.y++
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case ">":
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pred.x++
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case "<":
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pred.x--
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case "v":
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pred.y--
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}
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if !coordDansListe(l, pred) {
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l.PushFront(pred)
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ret = true
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}
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return pred, ret
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}
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func p_partie(file *os.File) {
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reader := bufio.NewReader(file)
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var nouvMaison bool
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var pred Coord
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pred.x, pred.y = 0, 0
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nbMaisons := 1
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listeMaison := list.New()
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listeMaison.PushFront(pred)
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for char, _, err := reader.ReadRune(); err != io.EOF; {
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pred, nouvMaison = nouvCoord(listeMaison, string(char), pred)
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if nouvMaison {
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nbMaisons++
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}
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char, _, err = reader.ReadRune()
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}
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fmt.Printf("Il y a %d maisons déservies\n", nbMaisons)
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}
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func d_partie(file *os.File) {
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reader := bufio.NewReader(file)
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var nouvMaison bool
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var predNoel, predRobot Coord
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predNoel.x , predNoel.y, predRobot.x, predRobot.y = 0, 0, 0, 0
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nbMaisons := 1
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listeMaison := list.New()
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listeMaison.PushFront(predNoel)
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char, _, err := reader.ReadRune()
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i := 0
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for err != io.EOF {
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if i % 2 == 0 {
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predNoel, nouvMaison = nouvCoord(listeMaison, string(char), predNoel)
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} else {
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predRobot, nouvMaison = nouvCoord(listeMaison, string(char), predRobot)
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}
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if nouvMaison {
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nbMaisons++
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}
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char, _, err = reader.ReadRune()
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i++
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}
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fmt.Printf("Il y a %d maisons déservies\n", nbMaisons)
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}
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func main() {
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inputFile, err := os.Open("input")
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if err != nil {
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panic(err)
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}
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fmt.Printf("Traitement partie 1…\n")
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p_partie(inputFile)
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inputFile.Seek(0, 0)
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fmt.Printf("Traitement partie 2…\n")
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d_partie(inputFile)
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inputFile.Close()
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}
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