题解 | #自守数#
自守数
http://www.nowcoder.com/practice/88ddd31618f04514ae3a689e83f3ab8e
while 1:
try:
s = int(input())
l = []
for i in range(s+1):
if str(i) == str(i**2)[-len(str(i)):]:
l.append(i)
print(len(l))
except:
break