#include<fstream>
#include<iostream>
#include<limits.h>
using namespace std;
ifstream in("scmax.in");
ofstream out("scmax.out");
int v[100001],l[100001],n;
void cit(){
    in>>n;
    int i;
    for(i=1;i<=n;i++)
        in>>v[i];
}
int main(){
    int i,j;
    cit();
    l[n]=1;
    for(i=n-1;i>=1;i--){
        int max=0;
        for(j=i+1;j<=n;j++)
            if(v[i]<v[j]&&l[j]>max)
                max=l[j];
        l[i]=max+1;
    }
    int m=0,poz,ls;
    for(i=1;i<=n;i++)
        if(l[i]>m){
            m=l[i];
            poz=i;
            ls=v[i];
        }
    out<<m<<'\n';
    out<<v[poz]<<' ';
    m--;
    for(i=poz+1;i<=n;i++)
        if(l[i]==m&&v[i]>ls){
            out<<v[i]<<' ';
            m--;
            ls=v[i];
        }
    return 0;
}