#include <cstdio>
#include <iostream>

using namespace std;

long long n;
long long k;

long long cal (int num) {
	if (!num) {
		return 1;
	}
	long long res = 0;
	while (num) {
		res += !(num % 10);
		num /= 10;
	}
	return res;
}

int main () {
	
	freopen ("whz_number.in", "r", stdin);
	freopen ("whz_number.out", "w", stdout);
	
	while (cin >> n >> k) {
		for (; k; n--) {
			k -= cal (n);
		}
		cout << n + 1 << endl;
	}

	return 0;
}