Day23

day23/day23.go

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+package main
+
+import (
+	"AOC2022/helper"
+	"fmt"
+)
+
+func main() {
+	//args := os.Args[1:]
+	lines := helper.ReadTextFile("day23/input")
+	elves := make(map[[2]int][3]int)
+	for i := 0; i < len(lines); i++ {
+		line := lines[i]
+		for j := 0; j < len(line); j++ {
+			if lines[i][j] == '#' {
+				elves[[2]int{i, j}] = [3]int{0, 0, 0}
+			}
+		}
+	}
+
+	noElvesMoves := false
+	i := 0
+	for !noElvesMoves {
+		//Get planned move for all elves
+		for key, _ := range elves {
+			elves[key] = getPlannedMove(key, elves, i)
+		}
+		//Move elves
+		noElvesMoves = moveElves(&elves)
+		i++
+		if i == 10 {
+			print(elves)
+		}
+	}
+	fmt.Println(i)
+
+}
+
+func moveElves(elves *map[[2]int][3]int) bool {
+	elvesWithPossiblePlanedMoves := [][2]int{}
+	plannedMoves := make(map[[2]int][][2]int)
+	for key, val := range *elves {
+		if val != [3]int{0, 0, 0} {
+			plannedMove := [2]int{key[0] + val[0], key[1] + val[1]}
+			plannedMoves[plannedMove] = append(plannedMoves[plannedMove], key)
+		}
+	}
+	for _, val := range plannedMoves {
+		if len(val) == 1 {
+			elvesWithPossiblePlanedMoves = append(elvesWithPossiblePlanedMoves, val[0])
+		}
+	}
+	if len(elvesWithPossiblePlanedMoves) == 0 {
+		return true
+	}
+	for _, elv := range elvesWithPossiblePlanedMoves {
+		moveElv(elv, elves)
+	}
+	return false
+}
+
+func moveElv(elv [2]int, elves *map[[2]int][3]int) {
+	plannedMove := (*elves)[elv]
+	newElv := [2]int{elv[0] + plannedMove[0], elv[1] + plannedMove[1]}
+	delete(*elves, elv)
+	(*elves)[newElv] = [3]int{0, 0, plannedMove[2] + 1}
+}
+
+func getPlannedMove(point [2]int, elves map[[2]int][3]int, pastMoves int) [3]int {
+	plannedMove := [3]int{0, 0, 0}
+	neighbors := getNeighbors(point)
+	neigborexist := false
+	checkedNorth := 0
+	checkedWest := 0
+	checkedSouth := 0
+	checkedEast := 0
+	for i, neighbor := range neighbors {
+		_, exist := elves[neighbor]
+		if exist {
+			neigborexist = true
+		} else {
+			if i >= 0 && i <= 2 {
+				checkedNorth++
+			}
+			if i >= 2 && i <= 4 {
+				checkedEast++
+			}
+			if i >= 4 && i <= 6 {
+				checkedSouth++
+			}
+			if i >= 6 || i == 0 {
+				checkedWest++
+			}
+		}
+	}
+
+	if neigborexist {
+		priorityList := []int{checkedNorth, checkedSouth, checkedWest, checkedEast}
+		directions := [][2]int{{-1, 0}, {1, 0}, {0, -1}, {0, 1}}
+		for i := 0; i < pastMoves; i++ {
+			priorityList = append(priorityList[1:], priorityList[0])
+			directions = append(directions[1:], directions[0])
+		}
+		for i, priority := range priorityList {
+			if priority == 3 {
+				direction := directions[i]
+				plannedMove = [3]int{direction[0], direction[1], 0}
+				break
+			}
+		}
+	}
+
+	return plannedMove
+}
+
+func getNeighbors(point [2]int) (neighbors [8][2]int) {
+	directions := [8][2]int{{-1, -1}, {-1, 0}, {-1, 1}, {0, 1}, {1, 1}, {1, 0}, {1, -1}, {0, -1}}
+	for i, direction := range directions {
+		neighbors[i] = [2]int{point[0] + direction[0], point[1] + direction[1]}
+	}
+	return
+}
+
+func print(elves map[[2]int][3]int) {
+	highestY := 0
+	highestX := 0
+	lowestY := 0
+	lowestX := 0
+	for key, _ := range elves {
+		if key[0] > highestY {
+			highestY = key[0]
+		}
+		if key[0] < lowestY {
+			lowestY = key[0]
+		}
+		if key[1] > highestX {
+			highestX = key[1]
+		}
+		if key[1] < lowestX {
+			lowestX = key[1]
+		}
+	}
+
+	for i := lowestY - 1; i < highestY+2; i++ {
+		fieldLine := []rune{}
+		for j := lowestX - 1; j < highestX+2; j++ {
+			val := '.'
+			_, ok := elves[[2]int{i, j}]
+			if ok {
+				val = '#'
+			}
+
+			fieldLine = append(fieldLine, val)
+		}
+		fmt.Println(string(fieldLine))
+	}
+	fmt.Println((highestY-lowestY+1)*(highestX-lowestX+1) - len(elves))
+	fmt.Println()
+
+}

day23/input

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+.#.##.#...###.#.#.#.#.#....##....#...##...##..#.##..#..#.#.#.###..#....
+.....#.#..####.......#.###.....##.#..#.###.#.#..##.#.#.#.#..##.#.######
+#.####.##..####.#####.#.##.#..##.#.#.###.######.#.#.##..#####.#.##..##.
+#..#.####...#..##...#.#####.######.#...#....##..##..#......##.#####..##
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+..#..##.##.###..###.###...#.##..##.#####..#.###.....##...##......##.#..
+.###.#..#.#..#..#.##..#...##.#...#...##...##.####....#....#####..####.#
+..#####...#..###...#..#.#.#.#..#....#.##.#.#....#.#.#.#.....#.#...###..
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day23/testinput

@@ -0,0 +1,7 @@
+....#..
+..###.#
+#...#.#
+.#...##
+#.###..
+##.#.##
+.#..#..

day23/testinput2

@@ -0,0 +1,6 @@
+.....
+..##.
+..#..
+.....
+..##.
+.....