#include <bits/stdc++.h>
using namespace std;

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

int coada[100005],recon[100005],v[100005],k;

int main()
{
    int i,j,n;
    fin>>n;
    for(i=1;i<=n;i++)
    {
        fin>>v[i];
        if(v[i]>v[coada[k]])
            {
                coada[++k]=i;
                recon[i]=coada[k-1];
            }
        else
        {
            int st=1,dr=k,mij=(st+dr)/2,sol;
            while(st<=dr)
            {
                if(v[i]<=v[coada[mij]])
                {
                    dr=mij-1;
                    sol=mij;
                }
                else
                    st=mij+1;
                mij=(st+dr)/2;
            }
            coada[sol]=i;
            recon[i]=coada[sol-1];
        }
    }
    fout<<k<<'\n';
    int sol[100005];
    sol[k]=v[coada[k]];
    int pas=1;
    i=coada[k];
    while(recon[i]!=0)
    {
        i=recon[i];
        sol[k-pas]=v[i];
        pas++;
    }
    for(i=1;i<=k;i++)
        fout<<sol[i]<<" ";
    return 0;
}