#include <iostream>
#include <random>
#include <chrono>

int main() {
    constexpr auto array_size = 10'000;
    int** array = new int*[array_size];
    for(int i = 0; i < array_size; ++i)
        array[i] = new int[array_size];

    const auto start = std::chrono::system_clock::now();
    for(int i = 0; i < array_size; ++i) {
        for(int j = 0; j < array_size; ++j) {
            array[j][i] = rand();
        }
    }
    const auto finish = std::chrono::system_clock::now();

    std::cout << std::chrono::duration_cast<std::chrono::milliseconds>(finish - start).count() << std::endl;
}