#include <bits/stdc++.h>
using namespace std;
ifstream in("scmax.in");
ofstream out("scmax.out");
int n,a[100010],b[100010],c[100010],ma,indx,l;

void scrie(int x)
{
    if (x==0) return;
    scrie(c[x]);out<<a[x]<<' ';
}

int main()
{

    in>>n;
    a[0]=2000000001;
    for(int i=1;i<=n;i++){
        in>>a[i];
        for(int j=i-1;j>=0;j--)
        {
            if(a[j]<a[i] && b[j]>b[i])b[i]=b[j],c[i]=j;

        }
        b[i]++;
        if(l<b[i])l=b[i],indx=i;
    }
    /*for(int i=1;i<=n;i++)
        cout<<b[i]<<' ';
    cout<<'\n';
    for(int i=1;i<=n;i++)
        cout<<b[i]<<' ';
    cout<<'\n';*/
    out<<l<<'\n';
    scrie(indx);

    return 0;
}