#include <stdio.h>
#include <stdint.h>
#include <stdlib.h>
 
int main(void) {
	int len = 8;
 
	uint16_t *a = calloc(len, sizeof(uint16_t));
 
    a[0] = 1;
    a[1] = 2;
    a[2] = 3;
 
    uint16_t *b = realloc(a, sizeof(uint32_t) * len);
 
    // We have used 3 slots.
    int i = 3;
 
    while (--i >= 0) {
    	b[i] = (uint16_t) b[i / 2];
    }
 
    printf("0: %d\n", b[0]); // 1 ?
    printf("1: %d\n", b[1]); // 2 ?
    printf("2: %d\n", b[2]); // 3 ?
 
	return 0;
}
 

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