//cel mai lung subsir crescator

#include <fstream>

using namespace std;

int n,m,i,j,maxi,p,a[100005],v[100005],pred[100005];

ifstream f("scmax.in");
ofstream g("scmax.out");

void afis(int x)
{
    if(x!=0)
    {
        g<<v[x]<<" ";
        afis(pred[x]);
    }
}

int main()
{
    f>>n;
    for(i=1; i<=n; i++)
        f>>v[i];
    a[n]=1;
    for(i=n-1; i>=1; i--)
    {
        maxi=0;
        for(j=i+1; j<=n; j++)
            if(v[i]<v[j]&&a[j]>maxi)
            {
                maxi=a[j];
                pred[i]=j;
            }
        a[i]=maxi+1;
    }
    maxi=0;
    for(i=1; i<=n; i++)
        if(a[i]>maxi)
        {
            maxi=a[i];
            p=i;
        }
    g<<maxi<<endl;
    afis(p);

    return 0;
}