#include <bits/stdc++.h>
#ifdef SHARAELONG
#include "../../cpp-header/debug.hpp"
#endif
using namespace std;
typedef long long ll;
typedef pair<int, int> pii;
void solve() {
int k;
cin >> k;
int sz = 1;
while (k > sz) sz *= 10;
int d;
cin >> d;
if (d == 0) {
if (k == 1) cout << 10;
if (2 <= k && k <= 11) cout << 100;
if (12 <= k && k <= 111) cout << 1000;
if (112 <= k && k <= 1111) cout << 10000;
if (1112 <= k && k <= 11111) cout << 100000;
if (11112 <= k) cout << 1000000;
} else if (d == 9) {
if (k == 1) cout << 9;
if (2 <= k && k <= 11) cout << 89;
if (12 <= k && k <= 111) cout << 889;
if (112 <= k && k <= 1111) cout << 8889;
if (1112 <= k && k <= 11111) cout << 88889;
if (11112 <= k) cout << 888889;
} else {
cout << d * sz;
}
}
int main() {
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
solve();
}
