#include <bits/stdc++.h>

using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");

int v[100005],lis[100005],urm[100005],n,i,j,maxim,start;
int main()
{
    fin>>n;
    for(i=1;i<=n;++i)
        fin>>v[i];
    for(i=n;i>=1;--i)
    {
        for(j=i+1;j<=n;++j)
        {
            if(v[i]<v[j] && lis[i]<=lis[j])
              lis[i]=lis[j]+1, urm[i]=j;
        }
        if(lis[i]==0)
            lis[i]=1, urm[i]=0;
        if(lis[i]>maxim)
            maxim=lis[i], start=i;
    }
    fout<<maxim<<'\n';
    do
    {
        maxim--;
        fout<<v[start]<<' ';
        start=urm[start];
    }while(maxim>0);

    return 0;
}