#include<fstream>
using namespace std;
ifstream cin("scmax.in");
ofstream cout("scmax.out");
int n,cnt,a[100001],b[100001];
int main(){
    cin>>n;
    for(int i=1; i<=n; i++)
        cin>>a[i];
    b[n]=1;
    for(int i=n-1; i>0; i--){
        b[i]=1;
        for(int j=i+1; j<=n; j++)
                if(a[i]<a[j]&& b[i]<=b[j])
                    b[i]=b[j]+1;
        cnt=max(cnt,b[i]);
    }
    cout<<cnt<<'\n';
    for(int i=1; i<=n&&cnt>0; i++)
        if(b[i]==cnt){
            cout<<a[i]<<' ';
            cnt--;
    }
    return 0;
}