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#include <iostream>
#include <fstream>
using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
int lung[100000],j,n,mx,poz;
long int a[100000];
int main()
{
f >> n;
for(int i=0;i<n;i++)
f>>a[i];
lung[n-1]=1;
for(int i=n-1;i>=0;i--)
{
mx=0;
for(j=i+1;j<n;j++)
if(a[i]<a[j])
if(mx<lung[j])
mx=lung[j];
lung[i]=mx+1;
}
mx=lung[0];
poz=0;
for(int i=1;i<n;i++)
if(mx<lung[i])
{
mx=lung[i];
poz=i;
}
g<<mx<<endl;
g << a[poz]<<" ";
for(int i=poz+1;i<n;i++)
if(lung[i]==mx-1 && a[i]>=a[poz])
{
g << a[i]<< " ";
poz=i;
mx--;
}
}