#include <fstream>
#define NMax 100005
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int N,X[NMax],DP[NMax],Succ[NMax],L[NMax],K,Max,PMax;
void Read()
{
    fin>>N;
    for(int i=1;i<=N;i++)
        fin>>X[i];
}

int Binary_Search(int val)
{
    int s=1,d=K,Sol=0;
    while(s<=d)
    {
        int mid=(s+d)/2;
        if(X[L[mid]]>val)
            {
                Sol=mid;
                s=mid+1;
            }
        else
            d=mid-1;
    }
return Sol;
}

void Solve()
{
    int i,j;
    DP[N]=1;K=1;L[1]=N;
    for(i=N-1;i>=1;i--)
        {
            j=Binary_Search(X[i]);
            DP[i]=DP[L[j]]+1;
            Succ[i]=L[j];
            L[j+1]=i;
            if(j==K)
                K++;

        }
for(i=1;i<=N;i++)
    {
        if(DP[i]>Max)
            {
                Max=DP[i];
                PMax=i;
            }
    }
}

void Print()
{
    int i=PMax;
    fout<<Max<<"\n";
    while(i)
    {
        fout<<X[i]<<" ";
        i=Succ[i];
    }
}

int main()
{
    Read();
    Solve();
    Print();
    return 0;
}