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#include <iostream>
#include <fstream>
using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
#define N_MAX 100003
int n, v[N_MAX],best[N_MAX],p[N_MAX],l[N_MAX],nr;
void write(int i)
{
if(p[i]>0) write(p[i]);
g<<v[i]<<' ';
}
int search1 (int x)
{
int p,u,m;
p=0;
u=nr;
m=(p+u)/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,poz,maxim;
nr=1;
f>>n;
for(i=1;i<=n;i++)
f>>v[i];
best[1]=l[1]=1;
l[0]=0;
for (i=2;i<=n;i++)
{
poz=search1(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 (i=1;i<=n;i++)
if(maxim<best[i])
{
maxim=best[i];
poz=i;
}
g<<maxim<<'\n';
write(poz);
f.close();
g.close();
return 0;
}