#include <iostream>
#include <vector>
using namespace std;
int main() {
    long int n;
    cin >> n;
    vector<long long> ans;
    vector<long long> ans1;
    for (auto i = 0; i < n; i++) {
        int op;
        cin >> op;
        if (op == 2) {
            long long data;
            cin >> data;
            ans.push_back(data);
        }
        if (op == 1) {
            for (auto i = 0; i < ans.size(); i++) {
                ans[i] = ans[i] + 1;
            }
        }
        long long yhh = ans[0];
        for (auto i = 1; i < ans.size(); i++) {
            yhh = yhh ^ ans[i];
        }
        ans1.push_back(yhh);
    }
    for (auto i = 0; i < ans1.size(); i++) {
        cout << ans1[i] << endl;
    }
    return 0;
}