#include <iostream>

using namespace std;

int main() {
    unsigned int x;  //表示神秘数
    unsigned int quan;
    int a[200000][30];
    int aa[30];
    unsigned int aaa;
    int num_count = 0;
    int op_count;
    int i, j, k, op;
    cin >> op_count;
    for (i = 0; i < op_count; i++) {
        cin >> op;
        if (op == 1) {
            aaa = 0;
            quan = 1;
            for (j = 0; j < num_count; j++) {
                k = 0;
                while (a[j][k] != 0) {
                    a[j][k] = 0;
                    if (aa[k] == 1)
                        aa[k] = 0;
                    else if (aa[k] == 0)
                        aa[k] = 1;
                    k++;
                }
                a[j][k] = 1;
                if (aa[k] == 1)
                    aa[k] = 0;
                else if (aa[k] == 0)
                    aa[k] = 1;
            }
            for (j = 0; j < 30; j++) {
                aaa += quan * aa[j];
                quan *= 2;
            }
            cout << aaa << endl;
        }
        if (op == 2) {
            aaa = 0;
            quan = 1;
            num_count++;
            cin >> x;
            k = 0;
            while (x != 0) {
                if (x % 2 == 1) {
                    if (aa[k] == 1)
                        aa[k] = 0;
                    else if (aa[k] == 0)
                        aa[k] = 1;
                }
                x = x / 2;
                k++;
            }
            for (j = 0; j < 30; j++) {
                aaa += quan * aa[j];
                quan *= 2;
            }
            cout << aaa << endl;
        }
    }
    return 0;
}