/* 
 * File:   main.cpp
 * Author: virtualdemon
 *
 * Created on April 26, 2010, 7:38 PM
 */
#include <cstdlib>
#include <fstream>
#include <iterator>
#include <algorithm>
#define Nmax 100011

/*
 * 
 */
using namespace std;
int N;
int v[Nmax], v2[Nmax], aib[Nmax], ss[Nmax], f[Nmax];
inline void UpDate( int x, int y )
{
    for( ; y <= N; y+=( y & -y ) )
        if( ss[aib[y]] < ss[x] )
            aib[y]=x;
}
inline int Query( int x )
{
    int mx=0;
    for( ; x; x-=( x & x ) )
        if( ss[aib[x]] > ss[mx] )
            mx=aib[x];
    return mx;
}
inline void output( ostream& out, int idx )
{
    if( idx )
    {
        output( out, f[idx] );
        out<<v[idx]<<' ';
    }
}
int main(int argc, char** argv)
{
    int i, idx, mx;
    int *start, *end;
    ifstream in( "scmax.in" );
    in>>N;
    start=v2+1;
    end=v2+N+1;
    for( i=1; i <= N; ++i )
    {
        in>>v[i];
        v2[i]=v[i];
    }
    sort( start, end );
    for( mx=0, i=1; i <= N; ++i )
    {
        idx=lower_bound( start, end, v[i] )-start+2;
        f[i]=Query( idx-1 );
        ss[i]=1+ss[f[i]];
        UpDate( i, idx );
        if( ss[i] > ss[mx] )
            mx=i;
    }
    ofstream out( "scmax.out" );
    out<<ss[mx]<<'\n';
    output( out, mx );
    return (EXIT_SUCCESS);
}