题解 | #自守数#
自守数
https://www.nowcoder.com/practice/88ddd31618f04514ae3a689e83f3ab8e
while True:
try:
num = int(input().strip())
res = 0
for i in range(num+1):
if str(i**2).endswith(str(i)):
res += 1
print(res)
except:
break
