def abs_sorted_pairs():
    pair_sum = 0
    while True:
        for a in range(pair_sum + 1):
            b = pair_sum - a
            for a_flip in ([1] if a == 0 else [1, -1]):
                for b_flip in ([1] if b == 0 else [1, -1]):
                    yield a * a_flip, b * b_flip
        pair_sum += 1


if __name__ == '__main__':
    print('first 100:')
    for i, p in zip(range(100), abs_sorted_pairs()):
        print(p)