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#include <bits/stdc++.h>
using namespace std;
ifstream f("scmax.in");
ofstream g("scmax.out");
int n,maxim,pozmax;
int a[100001],l[100001],poz[100001];
bool afisare(int nod)
{
if(poz[nod] == 0)
{
g<<a[nod]<<" ";
return true;
}
else
{
afisare(poz[nod]);
g<<a[nod]<<" ";
}
return true;
}
int main()
{
f>>n;
for(int i=0;i<n;++i)
f>>a[i];
l[0] = 1;
poz[0] = 0;
for(int i=1;i<n;++i)
{
maxim = 0;
for(int j=0;j<i;++j)
if(a[i]>a[j] && maxim<l[j])
{
maxim = l[j];
pozmax = j;
}
l[i] = maxim + 1;
poz[i] = pozmax;
}
maxim = 0;
for(int i=0;i<n;++i)
if(maxim<l[i])
{
maxim = l[i];
pozmax = i;
}
g<<maxim<<'\n';
afisare(pozmax);
return 0;
}