#include <cstdio>
#include <algorithm>
using namespace std;

int n,q,A[200010];
unsigned long long seed;
long long ans;

int next()
{
    seed = seed ^ (seed << 13);
    seed = seed ^ (seed >> 7);
    seed = seed ^ (seed << 17);
    return (seed >> 33);
}

void step(int x,int &y,int v)
{
    while(y > 0 && A[y] >= x) y -= v;
    if(y < 0) y = 0;
    while(y < n && A[y+1] < x) y += v;
    if(y > n) y = n;
}

int main()
{
    int i,x,y,z;

    scanf("%d%d%llu",&n,&q,&seed);
    for(i=0;i<10000;i++) next();
    for(i=1;i<=n;i++) A[i] = next();
    sort(A+1,A+n+1);

    for(i=0;i<q;i++)
    {
        x = next();
        y = 1LL*x*n/A[n];
        if(y > n) y = n;
        step(x,y,20); step(x,y,1);
        ans ^= 1LL*i*y;
    }
    printf("%lld",ans);
    return 0;
}