#include <iostream>
#include <fstream>
#define nmax 100005
using namespace std;

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

int a[nmax],lg[nmax],t[nmax],sol[nmax];
int main()
{   int i,n,j;
    int lgmax=0,imax,m;
    //cout<<sizeof(a)*3/1024.0;
    fin>>n;
    for(i=1;i<=n;i++) fin>>a[i];
    fin.close();
    lg[1]=1; t[1]=0;
    for(i=2;i<=n;i++)
        {lg[i]=1; t[i]=0;
         for(j=1;j<=i-1;j++)
            if(a[j]<a[i] && lg[j]+1>lg[i])
                {lg[i]=lg[j]+1;
                 t[i]=j;
                }
        }
    for(i=1;i<=n;i++) if(lg[i]>lgmax) {lgmax=lg[i]; imax=i;}
    m=1; sol[1]=a[imax];
    while(t[imax])
        {imax=t[imax];
         m++; sol[m]=a[imax];
        }
    fout<<lgmax<<"\n";
    for(i=m;i>=1;i--) fout<<sol[i]<<" ";
    fout<<"\n";
    fout.close();
    return 0;
}