KNN算法，用于数据挖掘中数据离散化处理-K nearest neighbor classifier (K-NN) is widely discussed and applied in pattern recognition and machine learning

设B是一个n×n棋盘,n 2k,(k 1,2,3,…),用分治法设计一个算法,使得：用若干个L型条块可以覆盖住B的除一个特殊方()