b

include using namespace std;

int main() {

int  k, sum1 = 0;
long long n;
cin >> n >> k;
int sum, a;

for (int i = 1; i <= k; i++) {

	int x = n % 10;
	sum *= x;

	n /= 10;
	sum += 1;
	a = x;
}

if (sum1 > k) {
	cout << 0;
}

cout << a;

return 0;

}