#include <iostream>
#include <fstream>
#define NMAX 100001
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int a[NMAX],lis[NMAX],n,max1,M;
int main()
{
    int i,poz,j;
    fin>>n;
    for(i=1;i<=n;++i)
        fin>>a[i];
    lis[n]=1;
    for(i=n-1;i>=1;i--)
    {
        max1=0;
        for(j=i+1;j<=n;++j)
            if(a[j]>a[i] && lis[j]>max1) max1=lis[j];
        lis[i]=1+max1;
        if(lis[i]>M) M=lis[i],poz=i;
    }
    fout<<M<<"\n";

    while(M)
    {
        M--;
       fout<<a[poz]<<" ";
       while(lis[poz]!=M) poz++;
    }
    return 0;
}