/*

*/

#include<iostream>
#include<fstream>
#define NMax 100005
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");

int main()
{
    int N,X[NMax],DP[NMax],Succ[NMax];
    fin>>N;
    for(int i=1;i<=N;i++)
        fin>>X[i];
    for(int i=N;i>=1;i--)
    {
        DP[i]=0;
        for(int j=i+1;j<=N;j++)
            if(X[i]<X[j]&&DP[i]<DP[j])
            {
                DP[i]=DP[j];
                Succ[i]=j;
            }
        DP[i]++;

    }
    int i, Max=0, PMax=0;
    for(int i=1;i<=N;i++)
    {
        if(DP[i]>Max)
        {
            Max=DP[i];
            PMax=i;
        }
    }
    fout<<Max<<"\n";
    i=PMax;
    while(i)
    {
        fout<<X[i]<<" ";
        i=Succ[i];
    }


return 0;
}