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#include <fstream>
using namespace std;
long long n, a[100005], l[100005];
ifstream fin("scmax.in");
ofstream gout("scmax.out");
void load()
{
int i;
fin >> n;
for( i=1 ; i<=n; i++){
fin >> a[i]; l[i]=0;
}
l[n]=1;
}
void scmax()
{
long long i,j, ma=0, poz,lmax=0,last,n2;
for( i=n-1; i>=1; i--)
{
ma=0;
for(j= i + 1; j<=n; j++)
if( a[i] < a[j] && l[j] > ma) ma=l[j];
l[i]=1+ma;
if(l[i]>lmax)
{
lmax=l[i];
poz=i;
}
}
gout<<lmax<<endl;
gout<<a[poz]<<" ";
last=a[poz];
lmax--;
for(i = poz+1; i<=n; i++)
if(l[i]==lmax && a[i]>last)
{
gout<<a[i]<<" ";
last=a[i];
lmax--;
}
}
int main()
{
load();
scmax();
return 0;
}