#include <bits/stdc++.h>

using namespace std;
using ll = long long;

int main(){

    int N, c;
    string S="";
    cin >> N;
    for (int i=1; i<=9; i++){
        cin >> c;
        S += string(c, '0'+i);
    }
    reverse(S.begin(), S.end());

    cout << S << endl;

    return 0;
}