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

#define MB_BYTES (1024*1024)

int main(void)
{
	unsigned long *p;
	int i = 0;
	int nr_mb;
	int bytes;
	int max;

	printf("please specify how many memory to alloc\n");
	scanf("%d", &nr_mb);

	bytes = nr_mb * MB_BYTES;
	max = bytes / 8;
	p = malloc(bytes);

	for (i = 0; i < max; i++)
		*(p + i) = i;

	while(1);

	return 0;
}