#include <bits/stdc++.h>

using namespace std;

ifstream fin("scmax.in");
ofstream fout("scmax.out");

long long v[100005] , x[100005];
int Mac;

int main()
{
    int n;
    fin >> n;
    for(int i = 1 ; i <= n ; i++)
        fin >> v[i];
    x[n] = 1;
    for(int i = n - 1 ; i >= 1 ; i--)
    {
        int mac = 0;
        for(int j = i + 1 ; j <= n ; j++)
            if(v[j] > v[i] && x[j] > mac) mac = x[j];
        x[i] = mac + 1;
        if(x[i] > Mac) Mac = x[i];
    }
    fout << Mac << '\n';
    for(int i = 1 ; i <= n ; i++)
       if(x[i] == Mac) fout << v[i] << " " , Mac--;
    return 0;
}