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 sc = new Scanner(System.in); String s = sc.next(); int k = sc.nextInt(); int left = 0; int right = 0; int res = 0; while (right < s.length()) { while (Long.parseLong(s.substring(left, right + 1)) >= k) { if (left == right) { right++; } left++; } while (right < s.length() && Long.parseLong(s.substring(left, right + 1)) < k) { int curLength = right - left + 1; res += curLength; right++; } } System.out.println(res); } }