Na_OH:
博客地址:https://www.cnblogs.com/sun-yinkai/
http://codeforces.com/problemset/problem/768/B B. Code For 1 一些常用的数学递推式 2016ChinaFinal(ShangHai) D - Ice Cream Tower
http://codeforces.com/problemset/problem/768/B B. Code For 1
一些常用的数学递推式
2016ChinaFinal(ShangHai) D - Ice Cream Tower