创建具有给定系数的多项式

def create_polynomial(coefficients):
    degree = len(coefficients) - 1
    polynomial = ""
    
    for i, coefficient in enumerate(coefficients):
        power = degree - i
        
        if power > 1:
            term = f"{coefficient}x^{power}"
        elif power == 1:
            term = f"{coefficient}x"
        else:
            term = str(coefficient)
        
        if i < len(coefficients) - 1:
            polynomial += term + " + "
        else:
            polynomial += term
    
    return polynomial

# 示例用法
coefficients = [2, -3, 1]  # 给定的系数
polynomial = create_polynomial(coefficients)
print(polynomial)  # 输出：2x^2 - 3x + 1