#include <fstream>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int n,i,P,maxim,t[100010],v[100010],d[100010],j,u,sol[100010],k;
int main () {
    fin>>n;
    for (i=1;i<=n;i++) {
        fin>>v[i];
    }
    d[1]=1;
    n++;
    v[n]=2000000000;
    for (i=2;i<=n;i++) {
        maxim=0;
        P=0;
        for (j=1;j<i;j++) {
            if (v[i]>v[j] && d[j]>maxim) {
                maxim=d[j];
                P=j;
            }
        }
        d[i]=maxim+1;
        t[i]=P;
    }
    fout<<d[n]-1<<"\n";
    u=t[n];
    while (u!=0) {
        sol[++k]=v[u];
        u=t[u];
    }
    for (i=k;i>=1;i--) {
        fout<<sol[i]<<" ";
    }
}