//=================================
// Created on: 2018/07/28 04:24:07
//=================================
#include <bits/stdc++.h>
#define show(x) std::cerr << #x << " = " << x << std::endl
using ll = long long;
using ull = unsigned long long;
int main()
{
    int N, Q;
    ull seed;
    std::cin >> N >> Q >> seed;
    int B = 1 << 2, S = 1 << 30;
    for (; B < N; B <<= 1, S >>= 1) {}
    std::vector<std::vector<int>> in(B);
    auto next = [&]() { return seed = seed ^ (seed << 13), seed = seed ^ (seed >> 7), seed = seed ^ (seed << 17), (seed >> 33); };
    for (int i = 0; i < 10000; i++) next();
    std::vector<int> A(N), C(B, 0);
    for (int i = 0; i < N; i++) { A[i] = next(), in[A[i] / S].push_back(A[i]); }
    for (int i = 1; i < B; i++) { C[i] = C[i - 1] + in[i - 1].size(); }
    ll ans = 0;
    for (ll i = 0; i < Q; i++) {
        const int x = next(), b = x / S;
        ll sub = C[b];
        for (const int e : in[b]) { sub += (e < x ? 1 : 0); }
        ans ^= (sub * i);
    }
    std::cout << ans << std::endl;
    return 0;
}