#include<cstdio>

using namespace std;

#define NMAX 100005
#define oo (1<<30)

int N,v[NMAX],best[NMAX],pred[NMAX];

void Read()
{
    freopen("scmax.in","r",stdin);
    scanf("%d",&N);
    for(int i=1;i<=N;i++)
        scanf("%d",&v[i]);
}

void Solve()
{
    best[1]=1;
    v[N+1]=oo;
    int i,j,bmax;
    for(i=1;i<=N+1;i++)
    {
        bmax=0;
        for(j=1;j<i;j++)
            if(v[j]<v[i] && best[j]>best[bmax])
                bmax=j;

        if(bmax)
            {
                best[i]=best[bmax]+1;
                pred[i]=bmax;
            }
            else
                {
                    best[i]=1;
                    pred[i]=0;
                }
    }

}

void rec(int i)
{
    if(best[i])
    {
        rec(pred[i]);
        printf("%d ",v[i]);
    }
}

void Print()
{
    freopen("scmax.out","w",stdout);
    printf("%d\n",best[N+1]-1);
    rec(pred[N+1]);
}

int main()
{
    Read();
    Solve();
    Print();
    return 0;
}