/in/foo.cc: In function 'void minHeapify(MinHeap*, int)':
/in/foo.cc:52:14: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     if (left < minHeap->size && minHeap->array[left]->freq < minHeap->array[smallest]->freq)
         ~~~~~^~~~~~~~~~~~~~~
/in/foo.cc:55:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     if (right < minHeap->size && minHeap->array[right]->freq < minHeap->array[smallest]->freq)
         ~~~~~~^~~~~~~~~~~~~~~