#!/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)