过年得把红灯挂。年前，是河北省石家庄市藁城区梅花镇屯头村最忙的时候，销售进入最旺。“宫灯小镇”在为千家万户的“大红灯笼高高挂”而繁忙。
Here's the insertion algorithm in Python. Step through the code and watch each line execute on the tree:
，详情可参考safew官方版本下载
Материалы по теме:
Drag out a search region below and watch the brute-force approach check every point, one by one: