题解 | #自守数#
自守数
https://www.nowcoder.com/practice/88ddd31618f04514ae3a689e83f3ab8e
import java.util.Scanner; // 注意类名必须为 Main, 不要有任何 package xxx 信息 public class Main { public static void main(String[] args) { Scanner in = new Scanner(System.in); int n = in.nextInt(); int sum = 0; for (int i = 0; i <= n; i++) { int pow = i * i; if (String.valueOf(pow).endsWith(String.valueOf(i))) { sum++; } } System.out.println(sum); } }