| from operator import mul | |
| from functools import reduce | |
| from itertools import combinations | |
| from itertools import takewhile | |
| f = open("input.txt") | |
| presents = list(map(int,f.readlines())) | |
| num_presents = len(presents) | |
| total_weight = sum(presents) | |
| balance_weight = total_weight//3 | |
| candidates = [] | |
| for i in range(10): | |
| for combo in combinations(presents,i): | |
| combo_sum = sum(combo) | |
| if combo_sum == balance_weight: | |
| candidates.append(list(combo)) | |
| candidates.sort(key=lambda i: len(i)) | |
| shortest_len = len(candidates[0]) | |
| candidates = takewhile(lambda i: len(i) == shortest_len, candidates) | |
| quantums = [reduce(mul,c,1) for c in candidates] | |
| quantums.sort() | |
| print(quantums[0]) | |