#include <fstream>
#include <math.h>
using namespace std;
int s[30000];
int main()
{
    ifstream fin ("schi.in");
    ofstream fout ("schi.out");
    int n, v[30000], i, j;
    fin >> n;
    for (i=1; i<=n; i++)
    {
        fin >> v[i];
    }
    for (i=n; i>=1; i--)
    {
        while (s[v[i]])
            v[i]++;
        fout << s[v[i]];
    }
    return 0;
}