题解 | 记数问题

import java.util.Scanner; 
import java.util.Arrays;

// 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 t = in.nextInt();
        int f = in.nextInt();
        int[] nums = new int[t];
        for (int i = 0 ; i < nums.length ; i++)
        {
            nums[i] = i + 1;
        }
        String n = Arrays.toString(nums);
        int ct = 0;
        char x = (char)(f + '0');
        for (int j = 0 ; j < n.length() ; j++)
        {
            if( n.charAt(j) == x)
            {
                ct++;
            }
        }
        System.out.println(ct);
    }
}