#include <iostream>
#include <thread>
#include <vector>
#include <chrono>
#include <atomic>

std::atomic<bool> running{true};

void cpu_burner() {
    while (true) {
        volatile double x = 1.0;
        for (int i = 0; i < 1000000; ++i) {
            x += x * 0.000001;
            x -= x * 0.000001;
        }
    }
}

int main() {
    int cores = std::thread::hardware_concurrency();
    if (cores == 0) cores = 4;
    std::vector<std::thread> threads;
    for (int i = 0; i < cores; ++i) {
        threads.emplace_back(cpu_burner);
    }


    for (auto& t : threads) {
        t.join();
    }

    return 0;
}