參考ide
【*】【https://blog.csdn.net/user11223344abc/article/details/81485842】【時間複雜度O(logN),好比二分法就是時間複雜度O(log2N) 遞歸也是O(log2N)】.net
【https://blog.csdn.net/qq_36582604/article/details/81661236】blog
【https://baijiahao.baidu.com/s?id=1609024533531824968&wfr=spider&for=pc】遞歸