#include <fstream>
using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
int n,i,j,L[1005],v[1005],maxL=1,poz[1005],pozmax,sol[1005];
int main()
{
    f>>n;
    for (i=1;i<=n;i++)
    {
        f>>v[i]; L[i]=1;
        for (j=1;j<i;j++)
        {
            if (v[j]<v[i] && L[j]+1>L[i]) {L[i]=L[j]+1; poz[i]=j;}
        }
        if (L[i]>maxL) {maxL=L[i]; pozmax=i;}
    }
    g<<maxL<<"\n";
    n=0;
    while (maxL)
    {
        sol[++n]=v[pozmax];
        pozmax=poz[pozmax];
        maxL--;
    }
    for (i=n;i>0;i--) g<<sol[i]<<" ";
    return 0;
}