AoC 2023 day 5, part 1

5/a.py

@@ -0,0 +1,66 @@
+#!/usr/bin/env python3
+# Copyright 2023 Síle Ekaterin Liszka
+#
+# Permission is hereby granted, free of charge, to any person obtaining a copy
+# of this software and associated documentation files (the "Software"), to deal
+# in the Software without restriction, including without limitation the rights
+# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+# copies of the Software, and to permit persons to whom the Software is
+# furnished to do so, subject to the following conditions:
+#
+# The above copyright notice and this permission notice shall be included in
+# all copies or substantial portions of the Software.
+#
+# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
+# IN THE SOFTWARE.
+
+data = []
+with open('input.txt', mode='r') as f:
+	for line in f.readlines():
+		data.append(line[:-1])
+
+_, seeds = data[0].split(': ', maxsplit=1)
+seeds = [int(seed) for seed in seeds.split(' ')]
+data = data[2:]
+
+direction = []
+maps = {}
+for line in data:
+	if ':' in line:
+		d, _ = line.split(' ', maxsplit=1)
+		direction.append(d)
+		maps[d] = []
+		continue
+
+	if not len(line):
+		continue
+
+	dest, src, rng = line.split(' ', maxsplit=2)
+	mod = int(dest) - int(src)
+	maps[d].append((int(dest), int(src), int(rng), mod))
+
+seed_map = {}
+for seed in seeds:
+	t = seed
+	m = {}
+	for step in direction:
+		for r in maps[step]:
+			src, rng, mod = r[1:]
+			if src <= t <= (src+rng):
+				x = t + mod
+				t = x
+				m[step] = t
+				break
+		if step not in m.keys():
+			m[step] = t
+	seed_map[seed] = [str(m[step]) for step in direction]
+
+lowest = int('9' * len(str(max(seeds))))
+for seed in seeds:
+	lowest = min(lowest, int(seed_map[seed][-1]))
+	print(seed, '->', seed_map[seed][-1] + '; lowest is', lowest)