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#include <fstream>
#define NMAX 100002
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int N,a[NMAX],dp[NMAX],f[NMAX];
void citire()
{
fin>>N;
for(int i=1; i<=N; i++)
{
fin>>a[i];
}
}
int main()
{
citire();
for(int i=N; i>=1; i--)
{
int lmax,poz;
lmax=poz=0;
for(int j=i+1; j<=N; j++)
{
if(a[i]<a[j] && dp[j]>lmax)
{
lmax=dp[j];
poz=j;
}
}
dp[i]=1+lmax;
f[i]=poz;
}
int ans,p;
ans=p=0;
for(int i=1; i<=N; i++)
{
if(dp[i]>ans)
{
ans=dp[i];
p=i;
}
}
fout<< ans << "\n";
for(int i=p; i; i=f[i])
{
fout<< a[i] << " ";
}
fout<< "\n";
return 0;
}