#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>

enum HANDLE_STATE {
 HANDLE_CREAT,
 HANDLE_DESTR
};


struct Array_uint64 { size_t count; uint64_t *v; };
static inline void Array_uint64_lifetime_handler(
		enum HANDLE_STATE state,
		struct Array_uint64 *self,
		void *data) {
	if(state == HANDLE_CREAT) {
		self->count = *(size_t*) data;
		printf("self: %zd, count: %d", self, self->count);
		self->v = (uint64_t*) calloc(self->count, sizeof(uint64_t));
	} else if (state == HANDLE_DESTR) {
		if(self->v) free(self->v);
	}
};

int main() {
 // XXX: size_t n = 0;
 int n; // FIXME: BUG
 printf("Number of elements to sum: ");
 // XXX: scanf(" %zu", &n);
 scanf(" %d", &n); // FIXME: BUG
 

 [[gnu::always_inline]] inline void data_cleanuper(struct Array_uint64 *v) {
	 Array_uint64_lifetime_handler(HANDLE_DESTR, v, ((void *)0) );
 }

 [[gnu::cleanup(data_cleanuper)]] struct Array_uint64 data;
 Array_uint64_lifetime_handler(HANDLE_CREAT, & data, &n);;

 for(int i = 0; i < data.count; ++i) {
  scanf(" %d", &n);
  data.v[i] = n;
 }
 n = 0; for(int i = 0; i < data.count; ++i) n += data.v[i];
 printf("Sum: %d\n", n);

 return 0;
}