diff options
| -rw-r--r-- | 2022/09/.gitignore | 1 | ||||
| -rw-r--r-- | 2022/09/Makefile | 1 | ||||
| -rw-r--r-- | 2022/09/input | 2000 | ||||
| -rw-r--r-- | 2022/09/puzzles.py | 68 |
4 files changed, 2070 insertions, 0 deletions
diff --git a/2022/09/.gitignore b/2022/09/.gitignore new file mode 100644 index 0000000..ffc46fe --- /dev/null +++ b/2022/09/.gitignore @@ -0,0 +1 @@ +puzzle-[12].py diff --git a/2022/09/Makefile b/2022/09/Makefile new file mode 100644 index 0000000..0a4e980 --- /dev/null +++ b/2022/09/Makefile @@ -0,0 +1 @@ +include ../../Makefiles/py.mk diff --git a/2022/09/input b/2022/09/input new file mode 100644 index 0000000..b87df75 --- /dev/null +++ b/2022/09/input @@ -0,0 +1,2000 @@ +U 1 +D 2 +U 1 +L 1 +R 1 +L 1 +D 1 +L 2 +U 2 +L 2 +D 2 +L 2 +D 2 +L 1 +R 1 +D 1 +U 1 +D 1 +R 1 +U 2 +D 2 +R 2 +L 2 +R 2 +D 2 +L 2 +D 2 +R 1 +L 2 +D 2 +R 2 +D 1 +R 1 +L 1 +D 1 +U 1 +L 2 +D 2 +R 1 +L 2 +R 1 +U 1 +R 1 +L 1 +R 2 +D 1 +U 1 +D 1 +R 1 +U 2 +R 2 +D 1 +R 2 +D 1 +U 1 +D 1 +R 2 +U 2 +D 1 +U 2 +D 1 +L 1 +D 1 +U 2 +R 1 +L 1 +R 1 +D 2 +U 1 +D 2 +L 1 +R 2 +U 2 +R 1 +D 1 +R 1 +U 1 +R 1 +U 2 +R 2 +L 1 +U 1 +D 2 +U 1 +D 2 +L 2 +D 1 +U 2 +L 1 +U 1 +D 1 +U 1 +L 1 +D 2 +L 2 +R 1 +D 1 +L 2 +D 2 +R 2 +L 1 +D 1 +L 2 +U 2 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/dev/null +++ b/2022/09/puzzles.py @@ -0,0 +1,68 @@ +#!/usr/bin/python3 + +# START PART 1 +SEGMENTS = 2 +# END PART 1 START PART 2 +SEGMENTS = 10 +# END PART 2 + +position = tuple[int, int] + + +class Segment: + def __init__(self): + self.x = 0 + self.y = 0 + + def track(self, pos: position) -> None: + x, y = pos + dx = x - self.x + dy = y - self.y + nx = 1 if dx > 0 else -1 + ny = 1 if dy > 0 else -1 + + match (abs(dx), abs(dy)): + case (2, 0): + self.x += nx + case (0, 2): + self.y += ny + case (2, 1) | (2, 2) | (1, 2): + self.x += nx + self.y += ny + + @property + def pos(self) -> position: + return self.x, self.y + + +def main() -> None: + with open("input", "r") as f: + data = [(xs[0], int(xs[1])) for xs in [l.split() for l in f.readlines()]] + + snake = [Segment() for _ in range(SEGMENTS)] + head = snake[0] + tail = snake[-1] + locs: set[position] = set() + + for d, c in data: + for _ in range(c): + match d: + case "U": + head.y += 1 + case "D": + head.y -= 1 + case "R": + head.x += 1 + case "L": + head.x -= 1 + + for i, segment in enumerate(snake[1:]): + segment.track(snake[i].pos) + + locs.add(tail.pos) + + print(len(locs)) + + +if __name__ == "__main__": + main() |