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#include <fstream>
#define N 100005
using namespace std;
int a[N],ex[N],maxi[N];
int main()
{
ifstream f("scmax.in");
ofstream g("scmax.out");
int n;
f>>n;
for(int i=1;i<=n;i++)
f>>a[i];
maxi[n]=1;
int poz=n,lmax=0;
for(int i=n-1;i>=1;i--)
{
maxi[i]=1;
for(int j=i+1;j<=n;j++)
if(a[i]<a[j] and maxi[i]<maxi[j]+1)
{
maxi[i]=maxi[j]+1;
ex[i]=j;
}
if(maxi[i]>lmax)
{
lmax=maxi[i];
poz=i;
}
}
g<<maxi[poz]<<"\n";
while(poz)
{
g<<a[poz]<<" ";
poz=ex[poz];
}
return 0;
}