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#include <iostream>
#include <fstream>
std::ifstream fin("scmax.in");
std::ofstream fout("scmax.out");
long n, a[100000], l[100000];
void citire()
{
fin>>n;
for(long i = 0; i < n; i++)
{
fin>>a[i];
}
l[n-1] = 1;
}
void subsir(long vec[], long lung[], long nr)
{
for(long i = nr - 2; i >= 0; i--)
{
long maxim = 0;
for(long j = i + 1; j < nr; j++)
{
if(vec[i] < vec[j] && lung[j] > maxim)
{
maxim = lung[j];
}
}
lung[i] = maxim+1;
}
long maxim = -1, ind = -1;
for(long i = 0; i < nr; i++)
{
if(lung[i] > maxim)
{
maxim = lung[i];
ind = i;
}
}
// std::cout<<maxim<<'\n';
fout<<maxim<<'\n'<<vec[ind]<<' ';
long t = vec[ind];
for(long i = ind + 1; i < nr; i++)
{
if(vec[i] > t && lung[i] == maxim-1)
{
maxim--;
t = vec[i];
fout<<vec[i]<<' ';
}
}
// fout<<'\n'<<'\n';
// for(int i = 0; i < nr; i++)
// {
// fout<<lung[i]<<' ';
// }
}
int main()
{
citire();
subsir(a, l, n);
return 0;
}