#include<bits/stdc++.h>
using namespace std;
ifstream fin ("scmax.in");
ofstream fout ("scmax.out");
int n,i,j,maxi,sol,aux;
int f[100001],v[100001],poz[100001];
int main(){
    fin>>n;
    f[n]=1;
    poz[n]=-1;
    aux=n;
    for(i=1;i<=n;i++)
        fin>>v[i];
    for(i=n-1;i>=1;i--){
        for(j=i+1;j<=n;j++)
            if(v[i]<v[j] && f[i]<f[j]+1){
                f[i]=f[j]+1;
                poz[i]=j;
                if(f[i]>maxi){
                    maxi=f[i];
                    aux=i;
                }
            }
    }
    fout<<maxi<<"\n";
    i=aux;
    while(i>0){
        fout<<v[i]<<" ";
        i=poz[i];
    }
}