#include<fstream>
using namespace std;
int t[100007], n, p, sol, solp, i, j, v[100007], maxim, L[100007];
ifstream in("scmax.in");
ofstream out("scmax.out");
void afisare(int x){
    if(x!=0){
        afisare(t[x]);
        out<<v[x]<<" ";
    }
}
int main(){
    in>>n;
    for(i=1; i<=n; i++)
        in>>v[i];
    for(i=1; i<=n; i++){
        maxim=0;
        for(j=1; j<i; j++){
            if(v[j]<v[i] && L[j]>maxim){
                maxim=L[j];
                p=j;
            }
        }
        L[i]=1+maxim;
        if(maxim!=0)
            t[i]=p;
        if(L[i]>sol){
            sol=L[i];
            solp=i;
        }
    }
    out<<sol<<"\n";
    afisare(solp);
return 0;
}