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#include<iostream>
#include<fstream>
#include<algorithm>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
long long maxi,maxim,poz,pozz,v[100002];
int i,j,n,t[100002],l[100002];
void sol(int a)
{
if(t[a]!=0)
sol(t[a]);
fout<<v[a]<<" ";
}
int main()
{
fin>>n;
for(i=1;i<=n;i++)
fin>>v[i];
for(i=1;i<=n;i++)
{
maxi=0;
for(j=1;j<i;j++)
{
if(v[i]>v[j]&&maxi<l[j])
{
maxi=l[j];
poz=j;
}
}
if(maxi>0)
{
l[i]=maxi+1;
t[i]=poz;
}else
l[i]=1;
if(l[i]>maxim)
{
maxim=l[i];
pozz=i;
}
}
fout<<maxim<<"\n";
sol(pozz);
fin.close();
fout.close();
return 0;
}