题解 | #密码验证合格程序#

```def check(s):
    if len(s) <= 8 :
        return False
    kind = [0, 0, 0, 0]
    for i in s:
        if i.isupper():
            kind[0] = 1
        elif i.islower():
            kind[1] = 1
        elif i.isdigit():
            kind[2] = 1
        else:
            kind[3] = 1
    if sum(kind) < 3:
        return False
    dic = {}
    for i in range(len(s) - 3):
        if s[i:i+3] not in dic:
            dic[s[i:i+3]] = 1
        else:
            dic[s[i:i+3]] += 1
    for j in dic:
        if dic[j] > 1:
            return False

while True:
    try:
        s = input()
        res = check(s)
        if res == False:
            print('NG')
        else:
            print('OK')
    except:
        break