#include <iostream>

using namespace std;

void push (int s[], int &v, int val)
    {
        if (v < 255)
            s[++v] = val;
    }
int top (int s[], int v)
{
    return s[v];
}
void pop (int &v)
{
    v = v - 1;
}

int main()
{
    int s[256], n, i, v = 0, val;
    string p;
    cin >> n;
    for (i = 1; i <= n; i++)
    {
            cin >> p;
        if (p == "push")
        {
            cin >> val;
            push (s, v, val);

        }
        if (p == "pop")
        {
            pop(v);

        }
        if (p == "top")
            cout << top(s, v) << endl;
    }
    return 0;
}