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#include <fstream>
using namespace std;
ifstream cin("scmax.in");
ofstream cout("scmax.out");
int v[100001],l[100001],vmin[100001];
void subsir(int p)
{
int i=p-1;
while(i>=0&&(v[i]>=v[p]||l[i]!=l[p]-1))
i--;
if(i>=0)
subsir(i);
cout<<v[p]<<" ";
}
int main()
{
int n,i,k,imax,st,dr,m,ans;
cin>>n;
for(i=0;i<n;i++)
cin>>v[i];
l[0]=1;
k=1;
vmin[1]=v[0];
imax=0;
for(i=1;i<n;i++)
{
st=1;
dr=k;
ans=0;
while(st<=dr)
{
m=(st+dr)/2;
if(v[i]>vmin[m])
{
ans=m;
st=m+1;
}
else
dr=m-1;
}
if(ans)
{
if(ans==k)
{
vmin[++k]=v[i];
imax=i;
}
else
vmin[ans+1]=v[i];
}
else
{
if(v[i]<vmin[1])
vmin[1]=v[i];
}
l[i]=ans+1;
}
cout<<l[imax]<<'\n';
subsir(imax);
return 0;
}