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#include <fstream>
using namespace std;
#define maxn 100010
ifstream cin("scmax.in");
ofstream cout("scmax.out");
int n,i,j,v[maxn],best[maxn],poz[maxn];
int maxim=0,p,nr;
int main()
{
cin>>n;
for(i=1; i<=n; i++)
{
cin>>v[i];
poz[i]=-1;
}
best[n]=1;
poz[n]=-1;
maxim=1; p=n;
for(i=n-1; i>=1; i--)
{
best[i]=1;
poz[i]=1;
for(j=i+1; j<=n; j++)
{
if(v[i]<v[j] && best[i] < best[j] +1)
{
best[i]=best[j]+1;
poz[i]=j;
if(best[i]>maxim)
maxim=best[i], p=i;
}
}
}
cout<<maxim<<"\n";
for(i=p , nr=1; i!=-1 && i<=n && nr<=maxim; i=poz[i], nr++)
{
cout<<v[i]<<" ";
}
}