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