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#include <bits/stdc++.h>
#define NMAX 100005
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int n,v[NMAX],best[NMAX],l[NMAX],p[NMAX],poz,maxim,nr;
void afis(int i)
{
if(p[i]>0)
{
afis(p[i]);
fout<<v[i]<<" ";
}
}
int caut(int x)
{
int st,dr,mij;
st=1;
dr=nr;
while(st<=dr)
{
mij=(st+dr)/2;
if(v[l[mij]]<x&&v[l[mij+1]]>=x)return mij;
else if(v[l[mij+1]]<x)st=mij+1;
else dr=mij-1;
}
return nr;
}
int main()
{
fin>>n;
for(int i=1;i<=n;i++)
{
fin>>v[i];
}
best[1]=l[1]=1;
nr=1;
for(int i=2;i<=n;i++)
{
poz=caut(v[i]);
p[i]=l[poz];
best[i]=poz+1;
l[poz+1]=i;
if(nr<poz+1)nr=poz+1;
}
for(int i=1;i<=n;i++)
{
if(best[i]>maxim)
{
maxim=best[i];
poz=i;
}
}
fout<<maxim-1<<'\n';
afis(poz);
}