#include <fstream>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int i,n,j,x,MAX,v[100001],sir[100001],l[100001],k;
int caut(int st,int dr,int val)
{
    int mij=0;
    if(st==dr)
        return dr;
    mij=(st+dr)/2;
    if(val>sir[mij])
        return caut(mij+1,dr,val);
    else
        return caut(st,mij,val);
}
int main()
{
    fin>>n;
    for(i=1;i<=n;i++)
        fin>>v[i];
    l[1]=1;
    sir[1]=v[1];
    k=1;
    for(i=2;i<=n;i++)
    {
        if(v[i]>sir[k])
        {
            k++;
            sir[k]=v[i];
            l[i]=k;
        }
        else
        {
            x=caut(1,k,v[i]);
            l[i]=x;
            sir[x]=v[i];
        }
    }
    for(i=1;i<=n;i++)
    {
        if(l[i]>MAX)
        {
            MAX=l[i];
            j=i;
        }
    }
    fout<<MAX<<"\n";
    while(l[j]!=1)
        j--;
    k=1;
    for(i=j;i<=n;i++)
    {
        if(l[i]==k)
        {
            fout<<v[i]<<" ";
            if(k==MAX)
            break;
            k++;
        }
    }
    return 0;
}