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

ifstream f("scmax.in");
ofstream g("scmax.out");

int n,k,v[100001],t[100001],r[100001];

void citire()
{
    f>>n;
    for(int i=0;i<n;++i)
        f>>v[i];
}

void cauta_adauga(int x,int ind)
{
    int st=0,dr=k,mij;
    while(st<=dr)
    {
        mij=(st+dr)/2;
        if(x>v[t[mij]])
            st=mij+1;
        else
            dr=mij-1;
    }
    t[st]=ind;
    r[ind]=st>=1?t[st-1]:-1;
}

void rezolva()
{
    memset(r,-1,sizeof(r));
    for(int i=1;i<n;++i)
    {
        if(v[i]>v[t[k]])
        {
            ++k;
            t[k]=i;
            r[t[k]]=t[k-1];
        }
        else
            cauta_adauga(v[i],i);
    }
}

void afis()
{
    g<<k+1<<"\n";
    int x=t[k],nr=k,ans[100001];
    while(x!=-1)
    {
        ans[nr--]=v[x];
        x=r[x];
    }
    for(int i=0;i<=k;++i)
        g<<ans[i]<<" ";

}

int main()
{
    citire();
    rezolva();
    afis();
    return 0;
}