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 number = in.nextInt(); int result = 0; for (int i = 0; i <= number; i++) { int pow = i * i; String powStr = String.valueOf(pow); String iStr = String.valueOf(i); String substring = powStr.substring(powStr.length() - iStr.length()); if(iStr.equals(substring)) { result++; } } System.out.println(result); } }