#include <fstream>
using namespace std;
int n,i,v[1010],D[1010],maxim,P,T[1010],j,u,sol[1010],k;
int main (){
    ifstream fin ("scmax.in");
    ofstream fout ("scmax.out");
    fin>>n;
    for (i=1;i<=n;i++){
        fin>>v[i];
    }
    n++;
    v[n]=2000000000;
    D[1]=1;
    for (i=2;i<=n;i++){
        maxim=0;
        P=0;
        for (j=1;j<i;j++){
            if (v[j]<v[i]&&D[j]>maxim){
                maxim=D[j];
                P=j;
            }
        }
        D[i]=maxim+1;
        T[i]=P;
    }
    u=n;
    while (u!=0){
        sol[++k]=v[u];
        u=T[u];
    }
    fout<<D[n]-1<<"\n";
    for (i=k;i>=2;i--){
        fout<<sol[i]<<" ";
    }
    return 0;
}