#include <bits/stdc++.h>

using namespace std;

int n, v[100001], nr[100001], MAX;

int main()
{
    cin>>n;
    for (int i=1; i<=n; i++)
        cin>>v[i];
    nr[n]=1;
    for (int i=n-1; i>=1; i--)
    {
        int max=0;
        for (int j=i+1; j<=n; j++)
            if(nr[j]>max && v[j]>v[i])
                max=nr[j];
        nr[i]=max+1;
        if(nr[i]>MAX)
            MAX=nr[i];
    }
    cout<<MAX<<'\n';
    for (int i=1; i<=n; i++)
        if(nr[i]==MAX)
            cout<<v[i]<<' ', MAX--;
    return 0;
}