unsigned int startTime = clock();
    for (int i = 0; i <= 4; i++)
    {
        interval[i].start = 0;
        interval[i].end = 0;
    }

    for (int i = 1; i <= 4; i++)
    {
        interval[i].end = 100000 / 4 * i;
        interval[i].start = interval[i - 1].end + 1;

        thr[i] = CreateThread(0, 0, &FactorialCalc, &interval[i], 0, 0);
    }

    WaitForSingleObject(thr[1], INFINITE);
    WaitForSingleObject(thr[2], INFINITE);
    WaitForSingleObject(thr[3], INFINITE);
    WaitForSingleObject(thr[4], INFINITE);

    unsigned int endTime = clock();
    unsigned int searchTime = endTime - startTime;