题解 | #自守数#
自守数
https://www.nowcoder.com/practice/88ddd31618f04514ae3a689e83f3ab8e
import sys
for line in sys.stdin:
a = int(line.rstrip())
list1 = []
n=0
for i in range(a+1):
#if str(i) == str(i*i):
if str(i*i)[-len(str(i)):] == str(i):
n+=1
print(n)
str(i*i)[-len(str(i)):] == str(i) 一个数是否等于另一个数的末尾
