---

#include <iostream>
#include <vector>
#include <thread>
#include <ctime>
#include <cstdlib>

void myInit(std::vector<int>& vect, int start, int end) {
    for (int i = start; i < end; i++) {
        vect[i] = rand() % 1001;
    }
}

int main() {
    system("chcp 1251 > nul");

    srand(time(nullptr));

    const int size = 1000000000;
    std::vector<int> vect(size);

    int threadCount = std::thread::hardware_concurrency();
    std::cout << "Thread count: " << threadCount << std::endl;
    int partSize = size / threadCount;

    std::vector<std::thread> threads;

    time_t start = clock();

    for (unsigned int i = 0; i < threadCount; i++) {
        int begin = i * partSize;
        int end = begin + partSize;

        if (i == threadCount - 1) {
            end = size;
        }

        threads.emplace_back(myInit, std::ref(vect), begin, end);
    }

    for (int i = 0; i < threadCount; i++) {
        threads[i].join();
    }

    time_t end = clock();

    double time_diff = (end - start) / 1000.0;

    std::cout << time_diff << " sec\n";
}