#include <iostream>
#include <fstream>

using namespace std;

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

int a[100001] , b[100001] , n,maxim=0;
int main(){
    fin>>n;
    for(int i=1;i<=n;i++)
        fin>>a[i];
    b[n]=0;
    for(int i=n;i>=1;i--)
    {   b[i] = 1;
        for(int j = i + 1 ; j <= n; j++)
            if(a[i] < a[j] && b[i] < b[j] + 1)
                {b[i] = b[j] + 1;maxim=max(maxim,b[i]);}}
    fout<<maxim<<endl;
    for(int i=1;i<=n;i++)
    {if(b[i]==maxim)
    {fout<<a[i]<<" ";maxim--;}}
}