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#include <iostream>
#include <fstream>;
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
long long v[100001];
int l[100001],poz[100001],n,maxl,p,ok,maxx;
void afisare(int i)
{
if(i>0)
{
int p = i;
while(i>0&&!(v[i]<v[p]&&l[i]==l[p]-1))
i--;
afisare(i);
fout<<v[p]<<" ";
}
}
int main()
{
fin>>n;
for(int i=1;i<=n;i++)
fin>>v[i];
l[1]=1;
maxx=1;
poz[1]=v[1];
for(int i=2;i<=n;i++)
{
maxl=0;
for(int j=maxx;j>=1&&!maxl;j--)
{
if(v[i]>poz[j])
maxl=j;
}
l[i]=maxl+1;
poz[l[i]]=v[i];
if(l[i]>maxx)
{
maxx=l[i];
p=i;
}
}
fout<<maxx<<'\n';
afisare(p);
return 0;
}