题解 | #密码验证合格程序#

def IsValidPwd(pwd):
    if len(pwd) <= 8:
        return False
    li = [False, False, False, False]
    for c in pwd:
        if 'a' <= c <= 'z':
            li[0] = True
        elif 'A' <= c <= 'Z':
            li[1] = True
        elif '0' <= c <= '9':
            li[2] = True
        else:
            li[3] = True
    if sum(li) < 3:
        return False
    li = []
    for start in range(0, 3):
        for i in range(start, len(pwd), 3):
            sub = pwd[i:i+3]
            if sub in li:
                return False
            li.append(sub)
    return True

while True:
    try:
        pwd = input()
    except EOFError:
        break
    print("OK" if IsValidPwd(pwd) else 'NG')