题解 | 密码验证合格程序

from sys import stdin
input1 = stdin.read().split()
def f(x):
    if len(x) < 8:
        return False
    c1,c2,c3,c4 = False,False,False,False
    for i in x:
        i = ord(i)
        if 48<=i<=57:
            c1 = True
        elif 65<=i<=90:
            c2 = True
        elif 97<=i<=122:
            c3 = True
        else:
            c4 = True
    if int(c1)+int(c2)+int(c3)+int(c4) < 3:
        return False
    set1 = set()
    n = len(x)
    for i in range(n-3):
        if x[i:i+3] not in set1:
            set1.add(x[i:i+3])
        else:
            return False
    return True
for i in input1:
    print("OK" if f(i) else "NG")