#include <stdio.h>
#define IN "scmax.in"
#define OUT "scmax.out"
#define NMAX 100005

int a[NMAX],lg[NMAX],prec[NMAX],v[NMAX];
int n,i,j,poz,maxim;

int main()
{
    FILE * fin=fopen(IN,"r");
    FILE * fout=fopen(OUT,"w");

    fscanf(fin,"%d",&n);
    for(i=1;i<=n;i++)
        fscanf(fin,"%d",&a[i]);
    lg[1]=1;
    prec[1]=0;
    for(i=2;i<=n;i++)
    {
        lg[i]=1; prec[i]=0;
        for(j=1;j<i;j++)
        {
            if(lg[j]+1>lg[j] && a[j]<a[i])
            {
                lg[i]=lg[j]+1;
                prec[i]=j;
            }
        }
    }
    maxim=-1;
    for(i=1;i<=n;i++)
    {
        if(lg[i]>maxim)
        {
            maxim=lg[i];
            poz=i;
        }
    }
    fprintf(fout,"%d\n",maxim);
    i=0;
    while(prec[poz]!=0)
    {
        v[++i]=a[poz];
        poz=prec[poz];
    }
    v[++i]=a[poz];
    for(j=i;j>0;j--)
    {
        fprintf(fout,"%d ",v[j]);
    }

    fclose(fin);
    fclose(fout);
    return 0;
}