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#include <fstream>
#include <cstring>
using namespace std;
ifstream cin("scmax.in");
ofstream cout("scmax.out");
int n,i,j,v[100001],nr[100001],tt[100001],Max,poz,k;
int main()
{
Max=0; poz=0;
cin>>n;
for(i=1;i<=n;i++)
cin>>v[i];
for(i=1;i<=n;i++)
{
nr[i]=1; tt[1]=0;
for(j=i-1;j>=1;j--)
{
if(v[i]>v[j])
if(nr[i]<nr[j]+1)
{
nr[i]=nr[j]+1;
tt[i]=j;
}
}
if(nr[i]>Max)
{
Max=nr[i];
poz=i;
}
}
cout<<Max<<"\n";
memset(nr,0,sizeof(nr));
k=Max;
while(k>0)
{
nr[k]=poz;
poz=tt[poz];
k--;
}
for(i=1;i<=Max;i++)
cout<<v[nr[i]]<<" ";
return 0;
}