easyRC4为对称加密，加密函数和解密函数一样，修改一下main函数就行

if__name__=="__main__":
    Key="WhereIsTheFLAG"
    enc=[195,9,221,178,213,181,65,218,40,240,50,46,100,185,192,60,123,5,131,46,171,112,91,101,100,20,11]
    flag=decrypt(enc,Key)
    print(flag)