def is_fibonacci(n: int) -> bool:
    # Tu código aquí
    positive = 5 * n * n + 4
    negative = 5 * n * n - 4
    
    sqrt_1 = positive ** 0.5
    sqrt_2 = negative ** 0.5
    return sqrt_1 % 1 == 0 or sqrt_2 % 1 == 0