def reverse_bits(decimal_num):  
    # 将十进制数转换为二进制字符串，并去掉"0b"  
    binary_str = bin(decimal_num & 0xFF)[2:]  # 确保只取8位  
    # 使用零填充到8位  
    padded_binary_str = binary_str.zfill(8)  
    # 颠倒二进制字符串  
    reversed_binary_str = padded_binary_str[::-1]  
    return padded_binary_str  

def to_signed_decimal(binary_str):  
    # 将二进制字符串转换为有符号十进制数  
    if binary_str[0] == '1':  
        # 如果最高位是1，表示是负数  
        return int(binary_str, 2) - (1 << len(binary_str))  
    else:  
        return int(binary_str, 2)  

def main():  
    # 输入三个十进制数  
    numbers = []  
    for i in range(1, 4):  
        num = int(input(f"请输入第{i}字节小端数: "))  
        numbers.append(num)  

    # 存储所有颠倒后的二进制结果  
    combined_binary = ""  
    for num in numbers:  
        reversed_bin = reverse_bits(num)  
        combined_binary += reversed_bin  
        
    print(f"合并后的颠倒二进制数: {combined_binary}")  

    # 将合并后的二进制字符串转换为有符号十进制  
    signed_decimal = to_signed_decimal(combined_binary)  
    print(f"合并后的颠倒二进制数对应的有符号十进制数: {signed_decimal}")  
    print(f"电压值: {signed_decimal/8388607*2.5*4}")  

if __name__ == "__main__":  
    main()