说明：  使用Logisim搭建电路，该电路串行输入一个二进制无符号数B(先从高位输入,每输入一个数字就相当于之前输入的数左移一位再加上当前输入的数字)，输出“2的B次幂”模5的余数的电路并提交。
(Logisim is used to build the circuit. The circuit serially inputs a binary unsigned number B (first from the high bit input, each input number is equivalent to the previous input number moved one bit to the left plus the current input number), outputs the remainder of modulo 5 of "2 B power" and submits it.)