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| import sys | |
| import re | |
| def find_repr(target, numbers): | |
| org_reprs = dict((number, str(number)) for number in numbers) | |
| curr_reprs = org_reprs | |
| while target not in curr_reprs: | |
| old_reprs, curr_reprs = curr_reprs, {} | |
| for x in old_reprs: | |
| for y in org_reprs: | |
| repr_x, repr_y = old_reprs[x], old_reprs[y] | |
| curr_reprs[x + y] = '(%s) + (%s)' % (repr_x, repr_y) | |
| curr_reprs[x - y] = '(%s) - (%s)' % (repr_x, repr_y) | |
| curr_reprs[x * y] = '(%s) * (%s)' % (repr_x, repr_y) | |
| if y > 0 and x % y == 0: | |
| curr_reprs[x // y] = '(%s)/(%s)' % (repr_x, repr_y) | |
| curr_reprs.update(old_reprs) | |
| return curr_reprs[target] | |
| if __name__ == '__main__': | |
| args = sys.argv[1:] | |
| numbers = [int(a) for a in args] | |
| if len(args) != 7: | |
| print('Usage: ./program <arg1> <arg2> <arg3> <arg4> <arg5> <arg6> <arg7>') | |
| else: | |
| result = find_repr(numbers[6], numbers[:6]) + ' = {}'.format(numbers[6]) | |
| print(result) |
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