#include <fstream>

#define nMax 100005
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int n, k;
int scmax[nMax], Sol[nMax], v[nMax];
void read()
{
    fin>>n;
    for(int i=1;i<=n;i++)
        fin>>v[i];
}
int binary_search_right(int val)
{
    int st=1, dr=k, poz=0;

    while(st<=dr)
    {
        int mid=st+(dr-st)/2;
        if(val<=scmax[mid])
        {
            poz=mid;
            dr=mid-1;
        }
        else
            st=mid+1;
    }
    return poz;
}
void solve()
{
    for(int i=1;i<=n;i++)
    {
        int poz=binary_search_right(v[i]);
        if(poz==0)
        {
            scmax[++k]=v[i];
            Sol[i]=k;
        }
        else
        {
            scmax[poz]=v[i];
            Sol[i]=poz;
        }
    }

    fout<<k<<'\n';
}
void write(int poz, int cnt)
{
    if(cnt==0)
        return;

    if(Sol[poz]==cnt)
    {
        write(poz-1, cnt-1);
        fout<<v[poz]<<" ";
    }
    else
        write(poz-1, cnt);
}
int main()
{
    read();
    solve();
    write(n, k);
    return 0;
}