#include <iostream>
#include <set>
using namespace std;
int main() {
    int n;
    int num;
    int temp;
    int operate;
    set<unsigned int> s;
    set<unsigned int> ts;
    set<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 = s.begin(); it != s.end(); it++) {
                ts.insert(*it + 1);
            }
            s.clear();
            for (it = ts.begin(); it != ts.end(); it++) {
                s.insert(*it);
            }
            for (it = s.begin(); it != s.end(); it++) {
                ans[i] = *it ^ ans[i];
            }
        } else {
            cin >> num;
            s.insert(num);
            for (it = s.begin(); it != s.end(); it++) {
                ans[i] = *it ^ ans[i];
            }
        }
    }

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