题解 | 自守数
自守数
https://www.nowcoder.com/practice/88ddd31618f04514ae3a689e83f3ab8e
while True:
try:
m = int(input())
n = 0
for i in range(m+1):
if str(i) == str(i**2)[-len(str(i)):]:
n += 1
print(n)
except:
break
