package test;

import java.util.*;

import java.io.*;

class EasyStack{

public static int getInt(String s) {

return Integer.parseInt(s);

}

public static void main(String[] args) throws java.lang.Exception {

BufferedReader bf= new BufferedReader (new InputStreamReader(System.in));

Stack stack = new Stack();

bf.readLine();

String line = null;

while((line = bf.readLine())!= null && line.length() > 0) {

int n = 0,e = 0;

if(line.length() == 1)

n = getInt(line);

else {

n = Character.getNumericValue(line.charAt(0));

e = getInt(line.substring(2,line.length()));

}

if(n == 1) stack.push(e);

else if(n == 2) {

if(!stack.empty()) stack.pop();

}

else{

if(!stack.empty())

System.out.println(stack.peek());

else

System.out.println("Empty!");

}

}

}

}