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#include<fstream>
using namespace std;
ifstream f ("scmax.in");
ofstream g ("scmax.out");
int n,v[100001],sol[100001],ns,a[100001],p;
int main ()
{
f>>n;
for(int i=1;i<=n;++i)
f>>v[i];
sol[n]=1; ns=1;
for(int i=n-1;i>=1;--i)
{
int w=0;
for(int j=i+1; j<=n;++j)
if(sol[j]>w && v[j]>v[i])
w=sol[j];
sol[i]=w+1; if(ns<w+1) {ns=w; p=i;}
}
g<<ns<<'\n'<<v[p]<<' ';
int k=p;p++;ns--;
for(int i=p;i<=n;++i)
if(sol[i]==ns && v[i]>v[k])
{
g<<v[i]<<' '; k=i;ns--;
}
g.close();
return 0;
}