题解 | #整数的十位#

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 a1 = (in.nextInt()/10)%10;
        System.out.println(a1);
        /*
        String a1 = in.next();
        System.out.println(a1.charAt(a1.length-2));
        */
    }
}