From 091c125f42463b372f0c2c99124578eb8fe13150 Mon Sep 17 00:00:00 2001 From: Bert Peters Date: Sun, 24 Jan 2021 10:22:37 +0100 Subject: [PATCH] Fix day 8 to paint front-to-back --- 2019/aoc2019/day08.py | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/2019/aoc2019/day08.py b/2019/aoc2019/day08.py index 8511313..0c1d818 100644 --- a/2019/aoc2019/day08.py +++ b/2019/aoc2019/day08.py @@ -24,10 +24,11 @@ def format_row(row: Iterable[int]) -> str: def part2(data: TextIO) -> str: - layers = list(parse_layers(25, 6, data)) background = numpy.zeros(25 * 6, numpy.int8) + background.fill(2) - for layer in reversed(layers): - background[layer != 2] = layer[layer != 2] + for layer in parse_layers(25, 6, data): + mask = background == 2 + background[mask] = layer[mask] return '\n'.join(format_row(row) for row in background.reshape(6, 25))