#include <iostream>
#include <fstream>
#include <algorithm>
#include <vector>

using namespace std;

ifstream in("prefmex.in");
ofstream out("prefmex.out");

int main()
{
    int n, input;
    cin>>n;
    vector<int> tacos;

    for(int i = 0; i<n; ++i)
    {
        cin>>input;
        tacos.push_back(input);
    }

    vector<int> tacos1(n, 0);

    bool check=false;

    for(int i = 0; i<n; ++i)
    {
        tacos1.clear();
        check=false;

        for(int j = 0; j<=i; ++j)
        {
            if(tacos[j]==0)
            {
                check=true;
                break;
            }
        }

        if(!check)
        {
            cout<<"0 ";
            continue;
        }

        copy(tacos.begin(), tacos.begin()+i+1, back_inserter(tacos1));

        sort(tacos1.begin(), tacos1.end());

        for(int j = 0; j<=i; ++j)
        {
            if(tacos1[j+1]-tacos1[j]>1)
            {
                cout<<tacos1[j]+1<<" ";
                break;
            }
        }
    }

}