extern int atoi(const char *ptr);\r
extern void exit(int status) __attribute__((noreturn));\r
extern void qsort(void *base, size_t nmemb, size_t size, int(*compar)(const void *, const void *));\r
extern int atoi(const char *ptr);\r
extern void exit(int status) __attribute__((noreturn));\r
extern void qsort(void *base, size_t nmemb, size_t size, int(*compar)(const void *, const void *));\r