import std.stdio, std.algorithm, std.range;

ulong seed;
int next() {
    seed = seed ^ (seed << 13);
    seed = seed ^ (seed >> 7);
    seed = seed ^ (seed << 17);
    return cast(int)(seed >> 33);
}
immutable B = 300000;
immutable S = (1L<<32) / B + 1;

void main() {
    int n; int q;
    readf("%d %d %d\n", &n, &q, &seed);
    foreach (i; 0..10000) next();

    int[] a = new int[n];
    foreach (i; 0..n) a[i] = next();
    a.sort!"a<b";

    int[] l = new int[B];
    int c = 0;
    foreach (i; 0..B+1) {
        l[i] = c;
        while (c < n && (a[c] / S) == i) c++;
    }

    long query(int x) {
        int i = x / S;
        return a[l[i]..l[i+1]].assumeSorted.lowerBound(x).length + l[i];
    }

    long sm = 0;
    foreach (i; 0..q) {
        int x = next();
        sm ^= query(x) * i;
    }
    writeln(sm);
}