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#include <fstream>
using namespace std;
ifstream cin("scmax.in");
ofstream cout("scmax.out");
int v[200001],poz[200001],d[200001],ans[200001];
int caut_bin(int x,int dr)
{
int mij,st=1,ans=0;
while(st<=dr)
{
mij=(st+dr)/2;
if(v[poz[mij]]<x)
{
ans=mij;
st=mij+1;
}
else
dr=mij-1;
}
return ans;
}
int main()
{
int n,l=0,b=0,maxim=0;
cin>>n;
for(int i=1;i<=n;i++)
{
cin>>v[i];
}
for(int i=1;i<=n;i++)
{
b=caut_bin(v[i],l);
l=max(b+1,l);
d[i]=b+1;
poz[d[i]]=i;
maxim=max(maxim,d[i]);
}
cout<<maxim<<endl;
/*for(int i=1;i<=n;i++)
{
cout<<d[i]<<" ";
}
cout<<'\n';*/
int cmaxim=maxim;
for(int i=n;i>=1;i--)
{
if(cmaxim==d[i])
{
ans[cmaxim]=v[i];
cmaxim--;
}
}
for(int i=1;i<=maxim;i++)
cout<<ans[i]<<" ";
return 0;
}