70 lines
1.9 KiB
Python
Executable file
70 lines
1.9 KiB
Python
Executable file
#!/usr/bin/env python
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import enum
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import itertools
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import sys
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from typing import NamedTuple
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class Point(NamedTuple):
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x: int
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y: int
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class Op(enum.StrEnum):
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RECT = "rect"
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ROTATE_ROW = "row"
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ROTATE_COLUMN = "column"
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MAX_X, MAX_Y = 50, 6
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def solve(input: str) -> str:
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def parse_line(input: str) -> tuple[Op, int, int]:
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split_input = input.split()
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if split_input[0] == "rect":
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x, y = split_input[1].split("x")
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return Op.RECT, int(x), int(y)
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op = Op(split_input[1])
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line_col, _, shift = split_input[-3:]
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return op, int(line_col[2:]), int(shift)
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def parse(input: str) -> list[tuple[Op, int, int]]:
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return [parse_line(line) for line in input.splitlines()]
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def display_message(instructions: list[tuple[Op, int, int]]) -> set[Point]:
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screen: set[Point] = set()
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for op, a, b in instructions:
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match op:
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case Op.RECT:
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for x, y in itertools.product(range(a), range(b)):
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screen.add(Point(x, y))
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case Op.ROTATE_ROW:
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pixels = {p for p in screen if p.y == a}
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screen -= pixels
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screen.update(Point((x + b) % MAX_X, y) for x, y in pixels)
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case Op.ROTATE_COLUMN:
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pixels = {p for p in screen if p.x == a}
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screen -= pixels
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screen.update(Point(x, (y + b) % MAX_Y) for x, y in pixels)
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return screen
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def display(pixels: set[Point]) -> str:
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return "\n".join(
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"".join("#" if Point(x, y) in pixels else " " for x in range(MAX_X))
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for y in range(MAX_Y)
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)
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instructions = parse(input)
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pixels = display_message(instructions)
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return display(pixels)
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def main() -> None:
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input = sys.stdin.read()
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print(solve(input))
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if __name__ == "__main__":
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main()
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