#include <ctime>
#include <iostream>
#include <thread>
#include <cmath>

constexpr int N = 100'000'000;
 
void foo()
{
  unsigned int ans = 0;
  for (unsigned int i = 0; i < N; i++) {
    ans += std::sqrt(i);
  }
  std::cout << ans << " " << (double)clock() / CLOCKS_PER_SEC << std::endl;
}

void bar()
{
  unsigned int ans = 0;
  for (unsigned int i = 0; i < N; i++) {
    ans += std::log(i);
  }
  std::cout << ans << " " << (double)clock() / CLOCKS_PER_SEC << std::endl;
}
 
int main()
{
    std::thread t1(foo);
    std::thread t2(bar);
    t1.join();
    t2.join();
    std::cout << (double)clock() / CLOCKS_PER_SEC << std::endl;
}