题解 | #配置文件恢复#

# 20240921
while True:
    try:
        ke = ['reset','reset board', 'board add','board delete','reboot backplane','backplane abort']
        val = ['reset what','board fault','where to add','no board at all','impossible','install first']
        s = input().split()
        if len(s) < 1 or len(s) > 2:
            print('unknown command')
        elif len(s) == 1:# 长度为1的只有一个
            if s[0] == ke[0][:len(s[0])]:
                print(val[0])
            else:
                print('unknown command')
        else:# len(s)==2
            ls = []
            for i in range(1,len(ke)):
               a = ke[i].split()
               if s[0] == a[0][:len(s[0])] and s[1] == a[1][:len(s[1])]:
                    ls.append(i) # 符合条件就把这个位置放入列表
            if len(ls) == 1:
                print(val[ls[0]])
            else:
                print('unknown command')


    except:
        break