#include <fstream>
using namespace std;

ifstream f("scmax.in");
ofstream g("scmax.out");
const int N=100000;
int v[N+1], t[N+1], s[N+1],n;

void lant(int k){
    g<<v[k]<<" ";
    if(t[k]!=0)
        lant(t[k]);
}
int main()
{
    int i,max,j,k;
    f>>n;
    for(i=1;i<=n;i++)
        f>>v[i];
    s[n]=1;
    t[n]=0;
    for(i=n-1;i>=1;i--){
        max=0;
        for(j=i+1;j<=n;j++)
            if(v[i]<v[j] &&s[j]>max){
               max=s[j];
               k=j;
            }
        s[i]=max+1;
        t[i]=k;
    }
    max=s[1];
    for(i=1;i<=n;i++)
        if(s[i]>max){
            max=s[i];
            k=i;
        }
    g<<max<<"\n";
    lant(k);
    return 0;
}