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#include <stdlib.h>
#define SIZE 1024

static int (**hnew())[2]
{
    return calloc(sizeof(int**), SIZE);
}
static void hdel(int (**e)[2])
{
    for (int i = 0; i < SIZE; i++) free(e[i]);
    free(e);
}
static int (**hget(int (**t)[2], int k))[2]
{
    for (int h = k & (SIZE - 1); **t && ***t != k; h = ((h + 1) & (SIZE - 1)), t += h);
    return t;
}
static void hset(int (**t)[2], int k, int v)
{
    for (int (**a)[2] = hget(t, k); !*a && (*a = malloc(sizeof(**t))); (**a)[0] = k, (**a)[1] = v);
}

// TEST DRIVER
#include <stdio.h>
int main()
{
    int (**table)[2] = hnew();

    hset(table, 10, 20);
    hset(table, 20, 30);
    hset(table, 30, 40);

    int (**a)[2] = hget(table, 10);
    int (**b)[2] = hget(table, 20);
    int (**c)[2] = hget(table, 30);

    printf("%d:%d\n", (**a)[0], (**a)[1]);
    printf("%d:%d\n", (**b)[0], (**b)[1]);
    printf("%d:%d\n", (**c)[0], (**c)[1]);

    hdel(table);
}