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#include <fstream>
#define N 100002
using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
int pred[N],sol[N],l[N],v[N];
int nr;
int caut(int x)
{
if(nr==0 || v[sol[nr]]<x)
{
++nr;
return nr;
}
int mij,st,dr,poz=0;
st=1,dr=nr;
while(st<=dr)
{
mij=(st+dr)/2;
if(v[sol[mij]]<x)
poz=mij,st=mij+1;
else
dr=mij-1;
}
return poz+1;
}
void write(int n)
{
if(n)
{
write(pred[n]);
g<<v[n]<<' ';
}
}
int main()
{
int n,poz;
f>>n;
for(int i=1;i<=n;++i)
{
f>>v[i];
poz=caut(v[i]);
sol[poz]=i;
l[i]=l[sol[poz-1]]+1;
pred[i]=sol[poz-1];
}
g<<l[n]<<'\n';
write(n);
f.close();
g.close();
return 0;
}