题解 | #自守数#有意思，学了很多数学知识
自守数
http://www.nowcoder.com/practice/88ddd31618f04514ae3a689e83f3ab8e
while True: try: n = int(input()) count = 0 for i in range(n+1): a = pow(i,2) a = str(a) b = len(str(i)) if int(a[-b:]) == i: count +=1 print(count) except: break
