#include<fstream>
#include<deque>
using namespace std;
ifstream cin("scmax.in");
ofstream cout("scmax.out");
long long int n,max1[1000005],x,max2,indice,imax=1;
deque <long long int> q[1000005];
int main()
{
    cin>>n;
    for(int i=1;i<=n;i++)
    {
        cin>>x;
        for(int k=1;k<=imax;k++)
        {
            if(q[k].empty() || q[k].back()<x){q[k].push_back(x);max1[k]++;
            if(max2<max1[k]){max2=max1[k];indice=k;}
            }
            else imax++;
        }
    }
    cout<<max2<<"\n";
    for(int i=0;i<q[indice].size();i++)
        cout<<q[indice][i]<<" ";
}