#include<bits/stdc++.h>
using namespace std;
int main(){
stack<int> s;
s.push(1);
s.push(2);
s.push(3);
s.push(4);
s.push(5);
cout<<s.top()<<"\n";
if(s.empty())
cout<<"Empty stack\n";
else
cout<<"Not an empty stack\n";
cout<<s.size()<<"\n";
return 0;
}
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