等差数列连续异或模板

网上找的模板,还不太懂,改了下,先留着

LL Get(LL dis, LL l, LL P, LL number)
{
	LL ret = 0;
	ret += (l / P) * number;
	l %= P;
	ret += (dis / P) * number * (number - 1) / 2;
	dis %= P;
	if (dis * number + l < P)
        return ret;
	else
        return ret + Get(P, (dis * number + l) % P, dis, (dis * number + l) / P);
}

LL GetYiHuo(LL l, LL r, LL dis)  //以x开始， y为结束， dis为等差 连续异或
{
    //number为计算的个数
    LL number = (r - l) / dis + 1, ans = 0, Sum, P = 1;
    for (LL i = 1; i <= 10; i++)
    {
        Sum = Get(dis, l, P, number);
        if (Sum & 1)
            ans += P;
        P <<= 1;
    }
    return ans;
}