#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
+#include <string.h>
#include <sys/types.h>
typedef unsigned char boolean;
#endif
#ifndef SIGN
-#define SIGN(a) ((a) < 0 ? -1 : ((a)>0 ? 1 : 0))
+#define SIGN(a) ((a) < 0 ? -1 : ((a) > 0 ? 1 : 0))
#endif
#define SIZEOF_ARRAY(array, type) (sizeof(array) / sizeof(type))