#include <unistd.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <time.h>
#include <limits.h>

#include <map>
#include <string>

// --| constants |--
enum Bool {NO=0, YES=1};

// --| typedefs |--
typedef struct timeval	tv_t;

// --| basic wrappers |--
static inline void
DieIf(int condition, char *msg) {
  if (condition) {
    fprintf(stderr, "%s", msg);
    exit(1);
  }
}

static inline void Die(char *msg) { fprintf(stderr, "%s", msg); exit(1); }
static inline void DieError(char *msg) { perror(msg); exit(1); }

static inline char *
Malloc(int n) {
  char	*rc;
  if ((rc=(char *)malloc(n)) == NULL)	DieError("Malloc");
  return rc;
}

// --| other wrappers |--
static inline pid_t
Fork(void) {
  pid_t		pid;
  if ((pid=fork()) < 0)	DieError("");
  return pid;
}

static inline int
Execvp(const char *path, char * const argv[]) {
  int		rc;
  if ((rc=execvp(path,argv)) < 0)	perror("");
  return rc;
}

static inline int
Execl(const char *path, const char *arg0, ...) {
  int		rc;
  if ((rc=execl(path,arg0,0)) < 0)	DieError("");
  return rc;
}

static inline int
Execve(const char *path, char * const argv[], char * const envp[]) {
  int		rc;
  if ((rc=execve(path,argv,envp)) < 0)	DieError("");
  return rc;
}

static inline char *
Getcwd(char *buf, size_t size) {
  if (getcwd(buf,size) == NULL)	DieError("Getcwd: ");
  return buf;
}

static inline char *
Getenv(char *name) {
  char	*p;
  if ( (p = getenv(name)) == NULL )	DieError("");
  return p;
}

static inline int
Putenv(char *name) {
  int	rc;
  if ( (rc = putenv(name)) != 0 )	DieError("");
  return rc;
}

static inline int
Setenv(const char *name, const char *value, int overwrite) {
  int	rc;
  if ((rc = setenv(name, value, overwrite)) != 0)	DieError("");
  return rc;
}

static inline pid_t
Wait(int *status) {
  pid_t		pid;
  if ((pid=wait(status)) < 0)	DieError("");
  return pid;
}

static inline pid_t
Waitpid(pid_t pid, int *status, int options) {
  if ((pid=waitpid(pid, status, options)) < 0)	DieError("");
  return pid;
}