题解 | #最长回文子串#
最长回文子串
https://www.nowcoder.com/practice/12e081cd10ee4794a2bd70c7d68f5507
str1 = input()
l1 = []
for i in range(len(str1)):
for j in range(1, len(str1)+1):
a = str1[i:j]
if len(a) > 0 and a[::-1] == a:
l1.append(a)
l2 = max(l1, key=lambda x: len(x))
print(len(l2))
