From 0a5c1f77d01fc0bd166494787f24562e2fd3a9e9 Mon Sep 17 00:00:00 2001 From: Botond Hende Date: Wed, 11 Dec 2024 10:18:23 +0100 Subject: renamed day folders to two digit format --- 2024/day08/solve.py | 34 ++++++++++++++++++++++++++++++++++ 1 file changed, 34 insertions(+) create mode 100644 2024/day08/solve.py (limited to '2024/day08/solve.py') diff --git a/2024/day08/solve.py b/2024/day08/solve.py new file mode 100644 index 0000000..9dba99e --- /dev/null +++ b/2024/day08/solve.py @@ -0,0 +1,34 @@ +lines = [] + +with open("input") as f: + for line in f: + lines.append(line.strip()) + +antennas: dict[str, list[tuple[int, int]]] = {} +for row_idx, line in enumerate(lines): + for col_idx, char in enumerate(line): + if char != ".": + if char not in antennas: + antennas[char] = [] + + antennas[char].append((row_idx, col_idx)) + +row_count = len(lines) +col_count = len(lines[0]) +antinodes: set[tuple[int, int]] = set() +for antenna_list in antennas.values(): + for idx, antenna1 in enumerate(antenna_list): + for antenna2 in antenna_list[idx + 1:]: + row_diff = antenna2[0] - antenna1[0] + col_diff = antenna2[1] - antenna1[1] + + pos1 = (antenna1[0] - row_diff, antenna1[1] - col_diff) + pos2 = (antenna2[0] + row_diff, antenna2[1] + col_diff) + + if 0 <= pos1[0] < row_count and 0 <= pos1[1] < col_count: + antinodes.add(pos1) + + if 0 <= pos2[0] < row_count and 0 <= pos2[1] < col_count: + antinodes.add(pos2) + +print(len(antinodes)) \ No newline at end of file -- cgit v1.2.3-70-g09d2