#include <cstdio>
#include <algorithm>
#include <vector>

using namespace std;

int x[1002],y[1002],z[1002],v,u[1002];

int main()
{
    FILE *f=fopen("scmax.in","r");
    FILE *g=fopen("scmax.out","w");
    int n,max=y[1],k;
    fscanf(f,"%d",&n);
    for(int i=1;i<=n;++i)
        fscanf(f,"%d",&x[i]);
    for(int i=1;i<=n;++i)
    {
        y[i]=1;
        for(int j=1;j<i;++j)
            if(x[i]>x[j])
                if(y[i]<y[j]+1)
                {
                    y[i]=y[j]+1;
                    z[i]=j;
                }
    }
    for(int i=2;i<=n;++i)
        if(y[i]>max)
        {
            max=y[i];
            k=i;
        }
    fprintf(g,"%d\n",max);
    do
    {
        ++v;
        u[v]=x[k];
        k=z[k];
    }while(k!=0);
    std::reverse(&u[1],&u[v+1]);
    for(int i=1;i<=v;++i)
        fprintf(g,"%d ",u[i]);
    fclose(f);
    fclose(g);
    return 0;
}