#ifdef IS_C
#include <stdio.h>
#define PRINT(STR) printf(STR); printf("\n")
#else
#include <iostream>
#define PRINT(STR) std::cout << STR << std::endl
#endif

int main() {
#ifdef CHECK_SURPASS_WARNING
  int unused;
#endif
#if defined(CHECK_USING_CLANG) && !defined(__clang__)
  PRINT("compiler is not clang");
  return 1;
#endif
  PRINT("all ok");
  return 0;
}