#include <iostream>
#include <stdio.h>
#include <stack>
using namespace std;
int main(){
    int t,x;
    cin>>t;
    while(t--){
    stack < int > s;
    string h;
    cin>>h;
    if(h=="push"){
        
            cin>>x;
            s.push(x);
}
    else if(h=="pop"){
      
            if(s.size()==0)
            cout<<"Empty"<<endl;
                else cout<<s.pop()<<endl; 
}
    else if(h=="query"){
            if(s.size()==0)
            cout<<"Anguei"<<endl;
                else cout<<s.top<<endl;}
    else if(h=="size"){
        cout<<s.size()<<endl;
}
}
    return 0;
}