#include <iostream>
#include <cstdio>
#include <cstring>

using namespace std;

int main() {
    unsigned int x;     //表示神秘数
    unsigned int quan;  //表示加权
    int a[200000][30];  //数据集合
    int aa[30];         //二进制异或和
    unsigned int aaa;   //十进制异或和
    int num_count = 0;  //集合大小
    int op_count;       //操作次数
    int i, j, k;
    int op;  //操作种类
    cin >> op_count;
    for (i = 0; i < op_count; i++) {
        aaa = 0;  //清空
        quan = 1;
        cin >> op;
        if (op == 1) {
            for (j = 0; j < num_count; j++) {
                k = 0;
                while (a[j][k] != 0) {
                    a[j][k] = 0;
                    aa[k] = 1 - aa[k];
                    k++;
                }
                a[j][k] = 1;
                aa[k] = 1 - aa[k];
            }
        }
        if (op == 2) {
            cin >> x;
            k = 0;
            while (x != 0) {
                if (x % 2 == 1) {
                    a[num_count][k] = 1;
                    aa[k] = 1 - aa[k];
                } else
                    a[num_count][k] = 0;
                x = x / 2;
                k++;
            }
            num_count++;
        }
        for (j = 0; j < 30; j++) aaa += quan * aa[j];
        cout << aaa << endl;
    }
    return 0;
}