// Test Case 1: No errors.
// Expected result: all OK
// Possible problem: nothing significant.

#include <iostream>
#include <fstream>
#include <string>
#include <math.h>
#include <cstdlib>
#include <unistd.h>

int main(void)
{
  std::cout << "Hello world. This is Test Case 1, and all is OK. " << std::endl;
  return 0;
}