#include <iostream>
#include <set>
#include <vector>
using namespace std;
int main() {
    int n;
    unsigned int num;
    int operate;
    vector<unsigned int> v;
    vector<unsigned int>::iterator it;
    cin >> n;
    unsigned int ans[n];
    for (int i = 0; i < n; i++) {
        ans[i] = 0;
    }
    for (int i = 0; i < n; i++) {
        cin >> operate;
        if (operate == 1) {
            for (it = v.begin(); it != v.end(); it++) {
                *it++;
                ans[i] ^= *it;
            }
        } else {
            cin >> num;
            v.push_back(num);
            for (it = v.begin(); it != v.end(); it++) {
                ans[i] ^= *it;
            }
        }
    }

    for (int i = 0; i < n; i++) {
        cout << ans[i] << endl;
    }
    return 0;
}