1)输入格式说明: 以指数递降方式输入多项式非零项系数和指数)(绝对值均为不超过1000的 整数)。数字间以空格分隔。 (2)输出格式说明: 以与输入相同的格式输出导数多项式非零项的系数和指数。数字间以空格分 B品但结尾不能有多余空格。设计代码

在设计这样的程序时，你需要编写一个函数，接受用户输入的多项式的系数和指数，然后计算并返回其导数的对应系数和指数。这里是一个基本的Python代码示例：

def calculate_derivative(coeff, power):
    if power > 0:
        derivative_coeff = coeff * power * (power - 1)
    else:
        derivative_coeff = 0

    return derivative_coeff, power - 1

def format_output(coeff, power):
    if coeff != 0:
        result = str(abs(coeff)) + ' ' + str(power)
    else:
        result = ''
    return result.strip()  # 移除多余的空格

def polynomial_derivative(input_str):
    coefficients = input_str.split()
    coefficients = [int(coeff) for coeff in coefficients]  # 将字符串转换成整数列表
    output_coefficients = []

    for i, coefficient in enumerate(coefficients):
        exponent = len(coefficients) - i - 1  # 计算当前项的指数
        derivative_coeff, new_exponent = calculate_derivative(coefficient, exponent)

        if derivative_coeff:
            formatted_derivative = format_output(derivative_coeff, new_exponent)
            output_coefficients.append(formatted_derivative)

    # 输出导数多项式，注意格式
    return ' '.join(output_coefficients)

# 用户输入示例
input_poly = "5 3 -2 1"
output_poly = polynomial_derivative(input_poly)
print("导数多项式:", output_poly)