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#include <iostream>
#include <fstream>
#include <vector>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
const int nmax=100005;
int n,best[nmax],pos[nmax];
long long a[nmax];
void read_data()
{
fin>>n;
for(int i=1;i<=n;i++)
fin>>a[i];
}
void solve()
{
for(int i=1;i<=n;i++)
best[i]=1;
for(int j=1;j<=n;j++)
for(int i=1;i<j;i++)
if(a[j]>a[i])
if(best[i]+1>best[j])
{
best[j]=best[i]+1;
pos[j]=i;
}
int mx=0,posMx=0;
for(int it=1;it<=n;it++)
if(best[it]>mx)
{
mx=best[it];
posMx=it;
}
vector <long long> v;
v.push_back(mx);
while(posMx!=0)
{
v.push_back(a[posMx]);
posMx=pos[posMx];
}
fout<<mx<<"\n";
for(int it=v.size()-1;it>0;it--)
fout<<v[it]<<" ";
}
int main()
{
read_data();
solve();
return 0;
}