https://blog.csdn.net/yinghui_yht/article/details/79892998
https://blog.csdn.net/yinghui_yht/article/details/80007212
2018第九届蓝桥杯C/C++ B组省赛题解
原文：https://www.cnblogs.com/askyfullofstars/p/12238899.html
