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| 1 | +#!/usr/bin/python |
| 2 | + |
| 3 | +import sys |
| 4 | +import copy |
| 5 | +import argparse |
| 6 | +import itertools |
| 7 | + |
| 8 | + |
| 9 | +def parse_arguments(): |
| 10 | + parser = argparse.ArgumentParser(description = 'Countdown - Numbers Game', |
| 11 | + add_help = False) |
| 12 | + |
| 13 | + parser._optionals.title = 'Target and List Numbers' |
| 14 | + |
| 15 | + parser.add_argument('-h', '--help', action = 'help', |
| 16 | + default = argparse.SUPPRESS, |
| 17 | + help = 'Countdown Numbers Game. Inform a list of six numbers (-l) and a target (-t).') |
| 18 | + |
| 19 | + parser.add_argument('-t', '--target', type = int, action = 'store', |
| 20 | + dest = 'target', default = 100, help = 'The target of the game.') |
| 21 | + |
| 22 | + parser.add_argument('-l', '--list', type = int, nargs = '+', |
| 23 | + default = [1, 2, 4, 8, 10, 25], help = 'List with six integers.') |
| 24 | + |
| 25 | + arguments = parser.parse_args() |
| 26 | + |
| 27 | + return arguments |
| 28 | + |
| 29 | + |
| 30 | +pd = {} |
| 31 | +def nubmers_game(L, t, s, ol): |
| 32 | + global pd |
| 33 | + ops = ['+', '-', '*', '/'] |
| 34 | + ss = copy.deepcopy(s) |
| 35 | + key = str((ss, L)) |
| 36 | + if key in pd: |
| 37 | + return pd[key] |
| 38 | + |
| 39 | + if len(L) == 1: |
| 40 | + if L[0] == t: |
| 41 | + print(f'Target: {t}\nNumbers: {ol}\nSolution: {ss}') |
| 42 | + return True |
| 43 | + else: |
| 44 | + pd[key] = False |
| 45 | + return False |
| 46 | + else: |
| 47 | + for c in itertools.combinations(L, 2): |
| 48 | + if not c[0] or not c[1]: |
| 49 | + continue |
| 50 | + tmp = L[:] |
| 51 | + tmp.remove(c[0]) |
| 52 | + tmp.remove(c[1]) |
| 53 | + exp1 = f'{c[0]} %s {c[1]}' |
| 54 | + exp2 = f'{c[1]} %s {c[0]}' |
| 55 | + if nubmers_game(tmp + [c[0] + c[1]], t, ss + [exp1 % ('+')], ol): |
| 56 | + return True |
| 57 | + elif nubmers_game(tmp + [c[0] - c[1]], t, ss + [exp1 % ('-')], ol): |
| 58 | + return True |
| 59 | + elif nubmers_game(tmp + [c[1] - c[0]], t, ss + [exp2 % ('-')], ol): |
| 60 | + return True |
| 61 | + elif nubmers_game(tmp + [c[0] * c[1]], t, ss + [exp1 % ('*')], ol): |
| 62 | + return True |
| 63 | + elif c[0] % c[1] == 0 and nubmers_game(tmp + [c[0] // c[1]], t, ss + [exp1 % ('/')], ol): |
| 64 | + return True |
| 65 | + elif c[1] % c[0] == 0 and nubmers_game(tmp + [c[1] // c[0]], t, ss + [exp2 % ('/')], ol): |
| 66 | + return True |
| 67 | + elif nubmers_game(tmp + [c[0]], t, ss, ol): |
| 68 | + return True |
| 69 | + elif nubmers_game(tmp + [c[1]], t, ss, ol): |
| 70 | + return True |
| 71 | + pd[key] = False |
| 72 | + return False |
| 73 | + |
| 74 | + |
| 75 | +if __name__ == '__main__': |
| 76 | + |
| 77 | + args = parse_arguments() |
| 78 | + |
| 79 | + if len(args.list) != 6: |
| 80 | + print(f'The set of numbers in Countdown is 6.') |
| 81 | + sys.exit(-1) |
| 82 | + |
| 83 | + if args.target < 0 or args.target > 999: |
| 84 | + print(f'The target number in Countdown is between 0 and 999.') |
| 85 | + sys.exit(-1) |
| 86 | + |
| 87 | + if not nubmers_game(args.list, args.target, [], args.list): |
| 88 | + print(f'Target: {args.target}') |
| 89 | + print(f'Numbers: {args.list}') |
| 90 | + print(f'Solution: Not found.') |
| 91 | + |
| 92 | + |
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