import ast

def subsets(set_):
    if len(set_) > 0:
        for subset in subsets(set_[1:]):
            yield subset
            yield set_[:1] + subset
    else:
        yield []

def cond(set_):
    it = subsets(set_)
    #skip empty subset, which always comes first
    next(it)
    for subset in it:
        if sum(subset) == 0:
            return True
    return False

line = input()
while line != "":
    print(cond(ast.literal_eval(line)))
    line = input()