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#include <fstream>
#define DMAX 1000000
using namespace std;
ifstream fin("scmax.in");
ofstream fout("scmax.out");
void citire();
int n;
int lis[DMAX];
int urm[DMAX];
int a[DMAX];
int main()
{int maxim=0,maxim1=0,st=0;;
int i,j;
citire();
lis[n]=1;
urm[n]=0;
for(i=n-1;i>0;i--)
{maxim=0;
for(j=i+1;j<=n;j++)
if(lis[j]>maxim&&a[i]<a[j])
{
maxim=lis[j];urm[i]=j;
}
lis[i]=maxim+1;
if(maxim>maxim1)
{maxim1=maxim;st=i;}
}
fout<<lis[st]<<'\n';
fout<<a[st]<<' ';
st=urm[st];
while(st)
{
fout<<a[st]<<' ';st=urm[st];
}
return 0;
}
void citire()
{int i;
fin>>n;
for(i=1;i<=n;i++)
fin>>a[i];
}