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#include <fstream>
using namespace std;
ifstream cin("scmax.in");
ofstream cout("scmax.out");
int n,v[100003],best[100003],p[100003],maxim,k,L[100003],nr;
void afis(int i)
{
if(p[i]>0)
afis(p[i]);
cout<<v[i]<<" ";
}
int cautare(int x)
{
int p,u,m;
p=0;u=nr;m=(u+p)/2;
while(p<=u)
{
if(v[L[m]]<x && v[L[m+1]]>=x)
return m;
else if(v[L[m+1]]<x) {p=m+1;m=(p+u)/2;}
else {u=m-1;m=(p+u)/2;}
}
return nr;
}
int main()
{
int i,j,poz;
nr=1;
cin>>n;
for(int i=1;i<=n;i++)
cin>>v[i];
best[1]=L[1]=1;L[0]=0;
for(i=2;i<=n;i++)
{
poz=cautare(v[i]);
p[i]=L[poz];
best[i]=poz+1;
L[poz+1]=i;
if(nr<poz + 1) nr=poz+1;
}
maxim=0;poz=0;
for(int i=1;i<=n;i++)
if(maxim<best[i])
{
maxim=best[i];poz=i;
}
cout<<maxim<<" ";
afis(poz);
return 0;
}