text: #ifndef FUNC_H
  #define FUNC_H
  #include<time.h>
  #include<sys/time.h>
  #include<sys/resource.h>
  #include<stdio.h>
  #include<stdlib.h>
  #include "data.h"
  #include <pthread.h>
  static inline void debug(Prod_int_Prod_int_Prod_int_int a) {
      printf("%d\n", a.fst);
      printf("%d\n", a.snd.fst);
  }
  static inline double get_time()
  {
      struct timeval t;
      gettimeofday(&t, NULL);
      return t.tv_sec + t.tv_usec*1e-6;
  }
  static inline int result(int a) {
      sleep(5);
      return a + 4;
  }
  #endif
  