to finish this exer and i’ll leave the classroom.
to finish this exer and i’ll leave the classroom.
i give up … now seeking help from internet.
i’ll have a try: from back to front, begin with the first nonleaf node, sift down.
finally done it. yeah.
btw sigh that wtcl.
语不惊人死不休
舍您其谁
done an easy exer.