#include <string.h>
#include <stdio.h>
#define B 5

typedef char APPLES[32];

enum MONTHS {Unknown, Jan, Feb, Mar, Apr, May, Jun, Jul, Aug,
			Sep, Oct, Nov, Dec};

typedef struct CELL *LIST;
struct CELL {
	APPLES variety;
	int harvested;
	LIST next;
};

typedef LIST HASHTABLE[B];

int h(APPLES x)
{
	int i, sum;

	sum = 0;
	for (i = 0; x[i] != '\0'; i++)
		sum += x[i];
	return sum % B;
}

int lookupBucket(APPLES a, LIST L)
{
	if (L == NULL)
		return Unknown;
	if (!strcmp(a, L->variety)) /* found */
		return L->harvested;
	else /* a not found; examine tail */
		return lookupBucket(a, L->next);
}

int lookup(APPLES a, HASHTABLE H)
{
	return lookupBucket(a, H[h(a)]);
}