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#include <fstream>
#define DIM 100000
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int lg, a[DIM], ind, lgmax;
int lis[DIM], urm[DIM];
void citire()
{
int i;
fin>>lg;
for(i=1;i<=lg;++i)
fin>>a[i];
}
void PD(int n)
{
int i, j, maxim=0;
lis[n]=1; urm[n]=0;
for(i=n;i>=1;--i)
{
maxim=0;
for(j=i+1;j<=n;++j)
if(a[i]<a[j])
{
if(maxim<lis[j])
{
maxim=lis[j];
ind=j;
}
}
lis[i]=maxim+1;
urm[i]=ind;
if(lgmax<lis[i])
{
lgmax=lis[i];
ind=i;
}
}
}
void afisare()
{
int i;
fout<<lgmax<<'\n';
fout<<a[ind]<<' ';
while(urm[ind]!=0)
{
ind=urm[ind];
fout<<a[ind]<<' ';
}
}
int main()
{
citire();
PD(lg);
afisare();
return 0;
}