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#include <bits/stdc++.h>
using namespace std;
ifstream fin ("scmax.in");
ofstream fout ("scmax.out");
int a[100002],n,lg[100002],d[100002],mx,nr,cnt;
void intoarcere(int k)
{
cnt++;
if(k==0)
{
fout<<cnt-1<<"\n";
return;
}
else
intoarcere(d[k]);
fout<<a[k]<<" ";
}
int main()
{
fin>>n;
for(int i=1;i<=n;i++)
{
fin>>a[i];
}
lg[1]=1;
for(int i=2;i<=n;i++)
{
lg[i]=1;
for(int j=1;j<i;j++)
{
if(lg[j]+1>lg[i] and a[i]>a[j])
{
lg[j]++;
d[i]=j;
}
}
}
for(int i=1;i<=n;i++)
{
if(d[i]>mx)
{
mx=d[i];
nr=i;
}
}
intoarcere(nr);
return 0;
}