#include <vector>
#include <cstdio>
using namespace std;

FILE * is = fopen ("scmax.in","r");
FILE * os = fopen ("scmax.out","w");

int n, lmax, pmax;
vector<long long int> a, L, t;

void Path( int i );

int main()
{
    fscanf( is, "%d", &n);
    a.resize( n + 1);
    L.resize( n + 1);
    t.resize( n + 1);
    for ( int i = 1; i <= n; i++ )
    {
        fscanf(is, "%d", &a[i]);
        L[i] = 1;
        for ( int j = 1; j < i; j++ )
            if ( L[i] < L[j] + 1 && a[i] > a[j] )
                L[i] = L[j] + 1, t[i] = j;
        if ( L[i] > lmax )
            lmax = L[i], pmax = i;
    }
    fprintf(os, "%d\n", lmax);
    Path( pmax );

    return 0;
}

void Path( int i )
{
    if ( i == 0 ) return;
    Path( t[i] );
    fprintf(os, "%d ", a[i]);
}