63 lines
1.5 KiB
Python
63 lines
1.5 KiB
Python
from __future__ import annotations
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from typing import Iterator
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day_num = 10
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def part1(lines: Iterator[str]) -> int:
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return sum(grab_values(lines))
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def part2(lines: Iterator[str]) -> list[str]:
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return draw(lines, 40, 6)
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def parse(line: str) -> None | int:
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"""
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Parses the a line into the two possible instructions.
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May raise if the instructions was invalid
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"""
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match line.split():
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case ['noop']:
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return None
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case ['addx', value]:
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return int(value)
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case _:
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raise Exception(f"Unknown line: {line}")
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def cycles(lines: Iterator[str]) -> Iterator[int]:
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"""
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Cycles through the instructions and yields a new value for each cycle
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"""
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register = 1
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for line in lines:
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yield register
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match parse(line):
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case None:
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pass
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case value:
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yield register
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register += value
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yield register
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def grab_values(lines: Iterator[str]) -> Iterator[int]:
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for cycle, value in enumerate(cycles(lines), start=1):
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if cycle in [20, 60, 100, 140, 180, 220]:
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yield cycle * value
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def draw(lines: Iterator[str], width: int, height: int) -> list[str]:
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picture = ""
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for cycle, sprite in enumerate(cycles(lines)):
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crt_pos = cycle % width
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if sprite - 1 <= crt_pos and crt_pos <= sprite + 1:
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picture += '#'
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else:
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picture += ' '
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if crt_pos == width - 1:
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picture += '\n'
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return picture.split('\n')[:height]
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