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def get_strength(a):
    return bin(a).count("1")

def main():
    value = int(input())
    strength_sum = 0
    result = []
    counter = 0
    while strength_sum < value:
        counter += 1
        strength_sum += get_strength(counter)
        result.append(counter)

    final_result = []

    for x in reversed(result):
        if strength_sum - get_strength(x) >= value:
            strength_sum -= get_strength(x)
        else:
            final_result.append(x)
    
    print(f"{len(final_result)}\n{' '.join([str(x) for x in final_result])}\n")



if __name__ == '__main__':
    main()