题解 | #密码截取#时间短

s = input() lis = [] a = len(s) for i in range(0,a-1): for j in range(i+1,a):#j的范围从i+1开始取值，时间缩短一半 if s[i]==s[j] and s[i+1:j] == s[j-1:i:-1]: lis.append(len(s[i:j+1])) print(max(lis))