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#include <iostream>
#include <fstream>
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
int main()
{
int n,i,j,maxx,a[100005],Lmax,dp[100005],poz,p[100005],dim=0,rez[100005];
fin>>n;
for(i=1;i<=n;i++)
fin>>a[i];
dp[1]=1;
for(i=2;i<=n;i++)
{
Lmax=0;poz=0;
for(j=1;j<i;j++)
if(a[j]<a[i]&&Lmax<dp[j])
{
poz=j;
Lmax=dp[j];
}
dp[i]=Lmax+1;
p[i]=poz;
}
maxx=-1;poz=0;
for(i=1;i<=n;i++)
if(dp[i]>maxx)
{
maxx=dp[i];
poz=i;
}
for(i=poz;i!=0;i=p[i])
{
dim++;
rez[dim]=a[i];
}
fout<<dim<<"\n";
for(i=dim;i>=1;i--)
fout<<rez[i]<<" ";
return 0;
}