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#include <fstream>
using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
long long a[100005],n,l[100005],b[100005],lmax,Max,i,j,poz,nr;
int main()
{f>>n;
for(i=1;i<=n;i++)
f>>a[i];
l[1]=1;
lmax=1;
for(i=2;i<=n;i++)
{
Max=0;
for(j=i-1;j>=1;j--)
if(Max<l[j] && a[i]>a[j])
Max=l[j];
l[i]=Max+1;
if(l[i]>lmax)
{
lmax=l[i];
poz=i;
}
}
g<<lmax<<endl;
nr=1;
b[nr]=a[poz];
lmax--;
for(i=poz-1;i>=1;i--)
if(a[i]<b[nr] && l[i]==lmax)
{
nr++;
b[nr]=a[i];
lmax--;
}
for(i=nr;i>=1;i--)
g<<b[i]<<" ";
return 0;
}