#include <iostream>
#include <fstream>
#include <vector>
#include <bitset>
#include <algorithm>
#include <cstring>
#include <cctype>

#define pb push_back
#define mp make_pair
#define MAXN 100003
#define DIM 8192

using namespace std;

class Reader
{
public:
    Reader(const char* filename)
    {
        if(filename[0]=='.'||filename[0]==0)
        {
            cout<<"Check INFILE.\n";
            return;
        }
        try
        {
            f.open(filename);
            pos = 0;
            if(f.fail())throw 1;
            f.read(buffer,DIM);
        }
        catch(int e)
        {
            cout<<"No INFILE.\n";
            delete this;
        }
    }
    inline Reader& operator >>(int& x)
    {
        x=0;
        sgn=1;
        while((buffer[pos]<'0'||buffer[pos]>'9')&&buffer[pos]!='-')
            if(++pos==DIM)
                f.read(buffer,DIM),pos=0;
        if(buffer[pos]=='-')sgn=-1,pos++;
        while(buffer[pos]>='0'&&buffer[pos]<='9')
        {
            x=x*10+buffer[pos]-'0';
            if(++pos==DIM)f.read(buffer,DIM),pos=0;
        }
        x*=sgn;
        return (*this);
    }
    inline Reader& operator >>(char* c)
    {
        aux = 0;
        while(isspace(buffer[pos]))
            if(++pos==DIM)
                f.read(buffer,DIM),pos=0;
        while(!isspace(buffer[pos]))
        {
            c[aux++]=buffer[pos];
            if(++pos==DIM)f.read(buffer,DIM),pos=0;
        }
        return (*this);
    }
    ~Reader()
    {
        f.close();
    }
private:
    ifstream f;
    int pos,aux,sgn;
    char buffer[DIM];
};

class Writer
{
public:
    Writer(const char* filename)
    {
        if(filename[0]=='.'||filename[0]==0)
            cout<<"Check OUTFILE. Nothing created.\n";
        else
        {
            g.open(filename);
            pos = 0;
        }
    }
    inline Writer& operator <<(int xx)
    {
        aux = 0;
        x = xx;
        if(xx<0)x=-x;
        if(x==0)
            nr[aux++]='0';
        while(x)
        {
            nr[aux++]=x%10+'0';
            x/=10;
        }
        if(xx<0)nr[aux++]='-';
        while(aux>0)
        {
            buffer[pos++]=nr[--aux];
            if(pos==DIM)g.write(buffer,DIM),pos=0;
        }
        return (*this);
    }
    inline Writer& operator <<(const char* c)
    {
        aux = 0;
        while(c[aux])
        {
            buffer[pos++]=c[aux++];
            if(pos==DIM)g.write(buffer,DIM),pos=0;
        }
        return (*this);
    }
    inline void flush()
    {
        g.write(buffer,pos);
        pos=0;
    }
    ~Writer()
    {
        g.write(buffer,pos);
        g.close();
    }
private:
    ofstream g;
    int pos,aux,x;
    char buffer[DIM],nr[21];
};

Reader f("scmax.in");
Writer g("scmax.out");

int n,i,j,pos,k,nr,maxim,v[MAXN],L[MAXN],p[MAXN],best[MAXN];

int caut(int x)
{
    int p,u,m;
    p=0,u=nr,m=(p+u)/2;
    while(p<=u)
    {
        if(v[L[m]]<x&&v[L[m+1]]>=x)return m;
        else if(v[L[m+1]]<x) p=m+1,m=(p+u)/2;
        else u=m-1,m=(p+u)/2;
    }
    return nr;
}
void afis(int i)
{
    if(p[i])afis(p[i]);
    g<<v[i]<<" ";
}
int main()
{
    ios_base::sync_with_stdio(false);
    f>>n;
    nr=1;
    for(i=1;i<=n;i++)
        f>>v[i];
    best[1]=L[1]=1;
    for(i=2;i<=n;i++)
    {
        pos=caut(v[i]);
        p[i]=L[pos];
        best[i]=pos+1;
        L[pos+1]=i;
        if(nr<pos+1)nr=pos+1;
    }
    pos=0;
    for(i=1;i<=n;i++)
        if(maxim<best[i])
        {
            maxim=best[i];
            pos=i;
        }
    g<<maxim<<"\n";
    afis(pos);
    return 0;
}