import java.util.*;
public class Main {
static Scanner s = new Scanner(System.in);
public static void main(String args[]) throws Exception {
// Your Code Here
int q = s.nextInt();
Main obj = new Main();
StacksUsingArrays stack = obj.new StacksUsingArrays();
Calculate(stack, q);
}
public static void Calculate(StacksUsingArrays st, int q) throws Exception {
//Write Your Code Here
/* Donot initialize another Scanner use the static scanner already declared*/
int arr[]=new int[2*q];
int j=0;
for(int i=1 ; i<q ; i++)
{
arr[j]=s.nextInt();
if(arr[j]==2)
{
j++;
arr[j]=s.nextInt();
st.push(arr[j]);
j++;
}
else
{
j++;
if(st.size()!=0)
System.out.println(st.pop());
if(st.size()==0)
System.out.println();
}
}
// int i=0;
// while(arr[i]!=0)
// {
// if(arr[i]==2)
// {
// i++;
// st.push(arr[i]);
// i++;
// }
// else
// {
// if(st.size()!=0)
// System.out.println(st.pop());
// i++;
// }
// }
}
private class StacksUsingArrays {
private int[] data;
private int tos;
public static final int DEFAULT_CAPACITY = 10;
public StacksUsingArrays() throws Exception {
// TODO Auto-generated constructor stub
this(DEFAULT_CAPACITY);
}
public StacksUsingArrays(int capacity) throws Exception {
if (capacity <= 0) {
System.out.println("Invalid Capacity");
}
this.data = new int[capacity];
this.tos = -1;
}
public int size() {
return this.tos + 1;
}
public boolean isEmpty() {
if (this.size() == 0) {
return true;
} else {
return false;
}
}
public void push(int item) throws Exception {
if (this.size() == this.data.length) {
int[] temp = new int[2 * data.length];
for(int i = 0;i < data.length;i++){
temp[i] = data[i];
}
data = temp;
}
this.tos++;
this.data[this.tos] = item;
}
public int pop() throws Exception {
if (this.size() == 0) {
throw new Exception("Stack is Empty");
}
int retVal = this.data[this.tos];
this.data[this.tos] = 0;
this.tos--;
return retVal;
}
public int top() throws Exception {
if (this.size() == 0) {
throw new Exception("Stack is Empty");
}
int retVal = this.data[this.tos];
return retVal;
}
public void display() throws Exception {
if (this.size() == 0) {
throw new Exception("Stack is Empty");
}
for (int i = this.tos; i >= 0; i--) {
System.out.println(this.data[i]);
}
}
}
}