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#include<fstream>
#include<cstring>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int n,v[100010],lu[100010],poz[100010],lmax,pr,i,j;
int main()
{
fin>>n;
for(i=1;i<=n;i++)
fin>>v[i];
for(i=1;i<=n;i++)
lu[i]=1;
memset(poz, -1, sizeof poz);
lmax=1;
for(i=n-1;i>0;i--)
{
for(j=n;j>i;j--)
{
if(v[i]<v[j] && lu[i]+lu[j]>lmax && i!=pr)
{
lmax=lu[i]=lu[i]+lu[j];
poz[i]=j;
pr=i;
}
}
}
fout<<lmax<<'\n';
for(i=1;i<=lmax;i++)
{
fout<<v[pr]<<" ";
pr=poz[pr];
}
fin.close();
fout.close();
return 0;
}