#include <fstream>

using namespace std;
ifstream in("scmax.in");
ofstream out("scmax.out");
int a[100005],sol[100005],bst[100005];
int main()
{int n,i,j,mx=0,p,u;
in>>n;
for(i=1;i<=n;i++)
in>>a[i];
bst[n]=1;
sol[n]=-1;
for(i=n-1;i>=1;i--)
{
    bst[i]=1;
    sol[i]=-1;
    for(j=i+1;j<=n;j++)
        if(a[i]<a[j]&&bst[i]<bst[j]+1)
        {
            bst[i]=bst[j]+1;
            sol[i]=j;
            if(mx<bst[i]) mx=bst[i],p=i;
        }
}
out<<mx<<'\n';
i=p;
while(i!=-1)
{
    out<<a[i]<<" ";
    i=sol[i];
}
    return 0;
}