#include <iostream>
#include <string>
#include <vector>
#include <algorithm>
#include <utility>
#include <map>
#include <cmath>
using namespace std;
typedef long long ll;
#define rep(i, n) for (int i=0;i < (int)(n);i++)

int main(){
    int n;
    cin >> n;
    string ans = "";
    rep(i,9){
        int x;
        cin >> x;
        rep(j,x) ans += ('0'+(i+1));
    }
    reverse(ans.begin(),ans.end());
    cout << ans << endl;
    return 0;
}