#include <bits/stdc++.h>

using namespace std;
using ll = long long;
 
#define rep(i, n)      for (int i = 0; i < (n); i++)
#define repr(i, n)     for (int i = (n) - 1; i >= 0; i--)
#define repe(i, l, r)  for (int i = (l); i < (r); i++)
#define reper(i, l, r) for (int i = (r) - 1; i >= (l); i--)
#define repi(i, l, r)  for (int i = (l); i <= (r); i++)
#define repir(i, l, r) for (int i = (r); i >= (l); i--)
#define range(a) a.begin(), a.end()
void initio() { cin.tie(nullptr); ios::sync_with_stdio(false); cout << fixed << setprecision(15); }

int main() {
  ll N, X; cin >> N >> X;
  vector<ll> A(N); rep(i, N) cin >> A[i];
  ll p = 1;
  rep(i, N) {
    p *= A[i] + 1;
    if (p - 1 > X) {
      cout << string(X, '0') << endl;
      return 0;
    }
  }
  if (count(range(A), 1) > 0 && N >= 2) {
    string ans(X, '0');
    for (int i = p - 1; i <= X; i++) {
      ans[i - 1] = '1';
    }
    cout << ans << endl;
  } else {
    abort();
  }
}