diff --git a/day24/day.go b/day24/day.go new file mode 100644 index 0000000..d1055fa --- /dev/null +++ b/day24/day.go @@ -0,0 +1,59 @@ +package day24 + +import ( + "math" + "tools" +) + +func getInputGrid(inp []string) (tools.GridToggle, map[int]tools.Coordinate) { + grid := tools.NewGridToggle() + targets := make(map[int]tools.Coordinate) + + for y, line := range inp { + for x, c := range line { + if c == '#' { + grid.Set(x, y, tools.On) + } else if c != '.' { + targets[int(c-48)] = tools.Coordinate{X: x, Y: y} + } + } + } + + return grid, targets +} + +func findShortestPathBetweenNodes(grid tools.GridToggle, targets map[int]tools.Coordinate, startNode int, alreadyVisited tools.Set, pathLen int, part2 bool) int { + alreadyVisited.Add(startNode) + minLen := math.MaxInt32 + for node, target := range targets { + if alreadyVisited.Contains(node) { + continue + } + thisLen := len(grid.GetPathAStar(targets[startNode], target, false)) - 1 + if alreadyVisited.Len() == len(targets)-1 { + if part2 { + return thisLen + pathLen + len(grid.GetPathAStar(target, targets[0], false)) - 1 + } else { + return thisLen + pathLen + } + } else { + thisLen = findShortestPathBetweenNodes(grid, targets, node, alreadyVisited.Copy(), thisLen, part2) + if thisLen < minLen { + minLen = thisLen + } + } + } + return minLen + pathLen +} + +func Part1(puzzle tools.AoCPuzzle) interface{} { + grid, targets := getInputGrid(puzzle.GetInputArray()) + + return findShortestPathBetweenNodes(grid, targets, 0, tools.NewSet(), 0, false) +} + +func Part2(puzzle tools.AoCPuzzle) interface{} { + grid, targets := getInputGrid(puzzle.GetInputArray()) + + return findShortestPathBetweenNodes(grid, targets, 0, tools.NewSet(), 0, true) +} diff --git a/inputs/24 b/inputs/24 new file mode 100644 index 0000000..81cc3d2 --- /dev/null +++ b/inputs/24 @@ -0,0 +1,39 @@ +####################################################################################################################################################################################### +#...........#.....#...........#.#.......#.....#.#...............#.....#.....#.......#.......#.......#.....................#.........#.....#...#3......#...#.#.............#.......#...# +#####.#.#.###.###.#####.#.#####.#.###.###.###.#.#.#.#.#.#.###.#.###.###.###.#.#######.#.#.#.###.###.#.#.#.#####.#.#.#####.###.#.#######.#############.#.#.#.#.#.#.###.#.#.#.#.###.#.#.# +#...#.#.#.#.....#.#...#...#.....#.....#.#...#.........#.....................#.....#...#...#.......#.....#.#.........#.#.#.#.#.......................#...#...#.#.#.#.....#.#.........#.# +#.#.#.#.#.#####.#.#.#.#.#.#.#.#.###.#.#.###.#.#.#.#.#.#########.#.###.###.#.#.###.###.#.#.#.#.###.#.#.#.#.#.#.#####.#.#.###.###.#######.#.#.#.###.#.###.#.#.#####.#####.#.#.###.#.#.#.# +#.#.#...#.....#.#.....#...#.#...#.#...#.......#...........#...#...#...#.#.....#.#...#...........#.#.......#...#...#.#.........#...#.......#.#...#.....#...#.......#.#.#.............#.# +#.#######.#.#.###.#.#.#####.#.#.#.#.###.#####.#.#.###.#.#.#.#.#.#.#.#.#.#.###.#.#.#.###.#######.#######.#.#.###.#.#.#.#.#.#.###.#.#.#.#.#.###.#.#####.#.#.#.#.#.#.#.#.#.###.#.#####.#.# +#.#...#.....#.......#.......#.#.......#...#.#.....#.#.#.#.#.#.......#...#.....#.#.#.#.#.........#...#...#...#.......#...#...#.....#.....#...#.........#...#.#...#...#...#.........#.#.# +#.#.#.#.###.###.#.#.#.###.###.#.#.###.#.#.#.#####.#.###.#.#####.#####.###.#.#.#.#.###.#.#.#.###.###.#.#.#.#.#.#####.#.###.#.#.###.#.#.#.#.###.###.#######.#.###.###.#.#######.#.#.#.#.# +#.#...#...#...............#...#...#...#.#.........#.#...#...#.#...#.#.....#...#.#...#.#.#...#.#.#.#.#.....#...#...#.......#.#...#.........#.#.....#.#...#.....#.#...#.#2#.....#.......# +#.#.#####.#########.#.###.#.#####.#.#.#.#######.#.###.#.#.#.#.###.#.#.###.#.###.#.#.#.#.#.###.###.#.#.#######.#.###.#.#.#.#.#.#.#.#####.###.#.###.#.#####.#.#.###.#.#.#.###.#.###.###.# +#...#...........#.....#.......#...#0..........#...#.....#.#...#.#...#.#.#...#.#.......#.........#...#.#...#.#.#.......#...#.#.........#.#.....................#.#.#.#.....#.#.....#...# +#.###.#.#.#.#.#.###.#.#.#.#.#.###.#.#.###.#.#.#.###.###.#.#####.#.#.#.#.###.#.#.###.#.#.###.###.#.#####.#.#.#.###.#.#######.#######.#.#.#.###.#.#.#.#.#.#######.#.#.#####.#.###.###.#.# +#...#...#...#.#...........#...#.#.....#...#...#.....#.#.............#...#.........#...#.....#...#.......#...#.#.............#.........#...#.#.....#.#.........#.............#...#.....# +#.#.#.###.#.###.#.#.#.###.#.###.#######.#.#.###.#.#.#.#.###.#.###.#.#.#.#.#####.#.#.#.#####.#.#####.#.#.#.#.###.###.#.###.###.###.#.#.#.###.#.#.###.#.#.###.#########.#####.#.#.#.##### +#.#...#.#.......#...#.....#.....#...#...#.....#...#...#.........#.....#.#.........#.....#.....#.........#...#.#.....#.#...#...#.#.#...#.#...#.........#.#...#.........#.#.......#.....# +#.#####.#.###.#.#.#.###.#.#.#.#.#.#.###.#.#.#.###.###.#.###.#.###.#.#.#.###.#.#####.###.#.#.#.#.#.#####.#.#.#.#.#.#.###.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.#.###.#.#.#.#.#.#.#.#.###.#.#.# +#.....#...#...........#...#...........#.#.....#...#.....#...#.#.#.#...#.....#...#...#...............#...#.........#...#.....#...#.#...#.#...#.....#.....#.....#...#.#...#...#.#.......# +###.###.#.#.#####.###.#####.#.###.#.#.#####.#.###.#.###.#.###.#.#.#.#.###.#.###.#.#.#.#.###.#.###.#.#.#.#.#.#.###.#.#.#.###.###.#.#.###.#########.#.#####.###########.#.###.###.#####.# +#...#1#...#...#.......#...#...#.#...#...#...........#.#.......#.......#.#.........#.#...#...#...............#...#.....#.#...#.#.....#.........#...#.....#.#...#...#.....#.#.#.#...#...# +#.###.###.#.#.#.#####.#.#.#.#.#.#.#####.#####.#.#####.#.#.#.#.###.#.#.#.###.#.###.#.###.#.#.#####.#.#.#####.#.#.###.#.###.#.#.#.#.#.#.#####.#.#.#.#.###.#.#.###.#.#.#.#.#.#.#.###.#.#.# +#.....#.#.#.#.........#.#.#.....#.....#...#.....#...#.............#...#...#.....#...#.......#.......#.#.....#...#...#.#...#.....#.#...#.....#.#.#.#.#.#.#.......#...........#.#5#.....# +#.###.#.#.###.###.###.#.#####.#.#.###.###.#.###.#############.#######.#.###.#.###.#.#####.#.#.#.#####.#.#.#####.#.#.#.#.#.#######.#.#.###########.#.#.#.#.#.#.#.#.#.###.#.#.#.#.#.###.# +#.....#...#...................#.......#...#...#.#.....#.............#.....#...#.....#.......#.#.#.........#.........#.......#.......#...#.........#.#...#...#.....#.#.....#...#...#.#.# +#.###.###.###########.###.#####.#####.###.#.#.#.#.#.#.###.#.###.#.#######.#.#.#.#.#.#.###.#.#.#####.#.#.#.#######.#.###.#.#.###.#.#.#.###.#####.#####.#.#.#.#.###.#.###.###########.#.# +#.#.#.#...#...#.....#.....#.#.......#.....#.....#...........#.#...#.........#.#.#.#.....#.#.#...........#...#...#...#.......#...#.........#.....#.....#.....#.......#...#...#.#...#...# +#.#.#.#.#.#########.#.#.###.#.#.###.###.#.#.#.###.#####.#.#.#.#.#.#.#######.#.#.#######.#.###.#.###.###.#.###.#.#.#.#######.#######.#.#.#.#####.#.###.#.#####.#.###.#.#.###.#.#######.# +#.#...#...#.#...................#.#...#.#...#.......#.#...#.#...#.#.#.....#.#...#...#...#.#.............#.....#...........#.........#...#.#.#.....#.......#.......#.....#...#.#...#...# +###.#.#.#.#.#.#.###.#.###.#####.#.#####.#.#.###.#.#.#.#####.#.###.#####.#.#.#.#.#.#.#.###.#.#.#####.###.#.###.#####.#.#.#.#####.###.#.#.#.#.#.#######.###.#.#.#########.###.#.#######.# +#.....#...................#...#.#...#...#...........#.#.......#.#.....#.#.....#...........#.....#.........#.#...........#...#.....#...#.....#.............#.#.#.........#.#.#.#.......# +#.#.#.#.#.###.#.#.#.#.#########.###.#.#.#.#########.#.#.#.#.#.#.###########.#.#.###.###.###.#.#.#.#.#.###.#.###.#.###.#.###.###.#.###.#.#.#####.#.#.#######.#.#.###.###.#.#.#.###.##### +#...#.#.#....7#.#...#.#.........#.....#...#.#.......#.....#...........#.#...#.......#.#...#.#...#...........#...#.#...#.....#...#.#.#...........#...#.#...#...#4....#...#...#...#.....# +###.#.#.###.#####.#.#.#.#.#.#.#.#.#.#.###.#.###.#.###.#######.#.#.###.#.#####.#.#####.###.#.###.#.#.#.#.#####.###.#.###.#.#.#.#.###.#.#.###.#.#.###.#.###.#########.#.###.#.#.#.#.#.#.# +#.....#.#.#.......#.#.#.......#.#.#.............#...#.........#.......#.#.#...........#.....#.....#...#...#.#.....#...#.....#.#.#...#...#...#.....#...#...#.#...#...#.#.#.....#...#.#.# +#.###.#.#.#########.#.#.#.#######.#.#.#.#.###.###.#####.#.#.#.#.#.###.#.#.#.#.#####.#.#.###.#.#.#.#.###.###.###.#.#.#######.#.#.###.#####.#.#.###.#.#.#####.###.#.#.###.#.#########.### +#.......#...#...#...#...#.#...#...#.#.#...#.#...........#.........#...#.#.#.#.....#...#.....#.#.....#...#...#...#.#.#.#...#...#.#...#.....#...........#.#.........#.....#.#.#...#.....# +#####.###.#####.#.#####.#######.#.#.#.###.#.#######.###.#####.###.#.#.#.#.#.#####.#####.###.###.###.#.#.###.#.#.#.###.#.#.###.#.#.#####.#.###.#.#.#.###.#.#.#.#.#.###.###.#.#.###.#.#.# +#.....#.#.#.......#...#.#.#.....#.........#...#.....#6......#...#.#...........#.......#.............#...#...#...#...#.#...#...#...#.....#.........#.#...#.....#.#.#.......#...#.#.#...# +####################################################################################################################################################################################### \ No newline at end of file diff --git a/inputs/24_test b/inputs/24_test new file mode 100644 index 0000000..d88d242 --- /dev/null +++ b/inputs/24_test @@ -0,0 +1,5 @@ +########### +#0.1.....2# +#.#######.# +#4.......3# +########### \ No newline at end of file diff --git a/main.go b/main.go index a795cbc..832d36f 100644 --- a/main.go +++ b/main.go @@ -21,6 +21,7 @@ import ( "aoc2016/day19" "aoc2016/day20" "aoc2016/day23" + "aoc2016/day24" "flag" "fmt" "os" @@ -61,7 +62,7 @@ func initDayFunctions() { // 21: {1: day21.Part1, 2: day21.Part2}, // 22: {1: day22.Part1, 2: day22.Part2}, 23: {1: day23.Part1, 2: day23.Part2}, - // 24: {1: day24.Part1, 2: day24.Part2}, + 24: {1: day24.Part1, 2: day24.Part2}, // 25: {1: day25.Part1, 2: day25.Part2}, } }