#include <fstream>
using namespace std;

ifstream fin("scmax.in");
ofstream fout("scmax.out");

int n,i,j,m,p,k,u,t[100010],sol[100010],v[100010],l[100010];

int main(){
    fin>>n;
    for(i=1;i<=n;i++)
        fin>>v[i];
    v[++n]=2000001110;

    l[1]=1;
    for(i=2;i<=n;i++){
        m=0;
        for(j=1;j<i;j++){
            if(v[j]<v[i] && l[j]>m){
                m=l[j];
                p=j;
            }
        }
        if(m!=0){
            l[i]=m+1;
            t[i]=p;
        }else{
            l[i]=1;
            t[i]=0;
        }
    }

    u=n;
    while(u!=0){
        sol[++k]=v[u];
        u=t[u];
    }

    fout<<k-1<<"\n";
    for(;k>=2;k--){
        fout<<sol[k]<<" ";
    }

    return 0;
}