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#include <iostream>
#include <fstream>
#include <algorithm>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int v[100001], n, l[100001], p[100001];
int main()
{
fin>>n;
for(int i=1; i<=n; i++)
{
fin>>v[i];
l[i]=1;
}
for(int i=n-1; i>=1; i--)
{
for(int j=i+1; j<=n; j++)
{
if(v[i]<v[j]&&l[i]<l[j]+1)
{
p[i]=j;
l[i]=l[j]+1;
}
}
}
int x=max_element(l+1, l+n+1)-l;
int t=l[x];
fout<<t<<' ';
while(t)
{
cout<<v[x]<<' ';
x=p[x];
t--;
}
//cout<<x;
return 0;
}