#include<fstream.h>

ifstream fin("scmax.in");
ofstream fout("scmax.out");
long i,j,x,max,n,v1[100000],v2[100000],v3[100000];
int main()
{   fin >> n;
    for (i=1;i<=n;i++)
		fin >> v1[i];
	for (i=n-1;i>=1;i--)
	{   for (j=i+1;j<=n;j++)
			if (v1[i] < v1[j] && v2[i] < v2[j] + 1)
			{   v2[i] = v2[j] + 1;
			    v3[i] = j;
				if (v2[i] > max)
				{   x = i;
				    max = v2[i];
				}
            }
	}
    fout << max+1 << '\n';
	while (x != 0)
    {   fout << v1[x] << " ";
        x = v3[x];	
	}
    return 0;
}