#include<fstream>
using namespace std;
ifstream f("scmax.in"); ofstream g("scmax.out");
int n,best[100003],a[100003],poz[100003];
int main()
{   f>>n;
    int i,j,p,lgm;
    for(i=1;i<=n;++i) f>>a[i];
    best[n]=1; poz[n]=-1; lgm=1; p=n;
    for(i=n-1;i;--i)
    {   best[i]=1; poz[i]=-1;
        for(j=i+1;j<=n;++j)
            if(a[i]<a[j] && best[i]<best[j]+1)
            {   best[i]=best[j]+1; poz[i]=j;
                if(best[i]>lgm) {lgm=best[i]; p=i;}
            }
    }
    g<<lgm<<'\n';
    i=p;
    while(i!=-1) {g<<a[i]<<' '; i=poz[i];}
    g.close(); return 0;
}