#include <fstream>

using namespace std;
int v[100001],lg[100001],maxx;
ifstream cin("scmax.in");
ofstream cout("scmax.out");
int main()
{int n;
 cin>>n;
 for(int i=1;i<=n;i++){
    cin>>v[i];
 }
 lg[n]=1;
 for(int i=n-1;i>=1;--i){
    maxx=0;
    for(int j=i+1;j<=n;++j)
        if(v[i]<v[j]&&lg[j]>maxx)
            maxx=lg[j];
    lg[i]=maxx+1;
 }
 int poz;
 maxx=0;
 for(int i=1;i<=n;++i)
    if(maxx<lg[i]){
        maxx=lg[i];poz=i;
    }
cout << maxx <<"\n";
 cout<<v[poz]<<" ";
 for(int i=poz+1;i<=n&&maxx;++i)
    if(lg[i]==maxx - 1&&v[i]>v[poz]){
            cout<<v[i]<<" ";poz=i;maxx--;
    }
}