#!/usr/bin/env python # https://adventofcode.com/2025/day/10 from itertools import combinations, product f = open("day10input.txt", "r") # regular input #input = f.readlines() # testinput input = "[.##.] (3) (1,3) (2) (2,3) (0,2) (0,1) {3,5,4,7}\n[...#.] (0,2,3,4) (2,3) (0,4) (0,1,2) (1,2,3,4) {7,5,12,7,2}\n[.###.#] (0,1,2,3,4) (0,3,4) (0,1,2,4,5) (1,2) {10,11,11,5,10,5}".split("\n") machines = [] for input_line in input: line = input_line.rstrip("\n").split(" ") machine = {} # final state fs = line[0][1:-1].replace(".", "0").replace("#", "1") machine["fs"] = int(fs, base=2) # switches switches = [] for switch in line[1:-1]: s = ["0"] * len(fs) for i in [int(j) for j in switch[1:-1].split(",")]: s[i] = "1" switches.append("".join(s)) machine["s"] = sorted([int(s, base=2) for s in switches], key=int.bit_count) # joltage req's machine["j"] = [int(n) for n in line[-1][1:-1].split(",")] machines.append(machine) def print_machines(machines: list[dict]) -> None: for i in range(len(machines)): print(f"Machine no. {i}") for k in machines[i].keys(): print(f"key:\t{k}\tvalue:\t{machines[i][k]}") def part1_bfs(m): for steps in range(1, len(m["s"])): # check if current step no yields a solution for c in list(combinations(m["s"], steps)): lights = 0 for i in c: lights ^= i if lights == m["fs"]: print(f"Success with combo {i} and step count of {steps}") return steps return None # PART 2 IS NOT WORKING YET def part2_bfs(m): l = len(m["j"]) switches = ["{0:b}".format(n).zfill(l) for n in m["s"]] steps = 1 while True: print(f"{steps=}") # check if current step no yields a solution for c in list(product(switches, repeat=steps)): # print(f"{c=}") j = [] for i in range(l): j.append(sum([int(s[i]) for s in c])) # print(f"{j}\t{m['j']}") if j == m["j"]: print(f"Success with combo {i} and step count of {steps}") return steps steps += 1 return None print_machines(machines) print(sum(list(map(part1_bfs, machines)))) #print(sum(list(map(part2_bfs, machines))))