| 1 | 
https://acm.hdu.edu.cn/showproblem.php?pid=1159 | 
板子 | 
入门 | 
| 2 | 
http://poj.org/problem?id=1384 | 
 | 
入门 | 
| 3 | 
https://acm.hdu.edu.cn/showproblem.php?pid=1864 | 
 | 
中等 | 
| 4 | 
https://acm.hdu.edu.cn/showproblem.php?pid=1231 | 
 | 
中等 | 
| 5 | 
https://acm.hdu.edu.cn/showproblem.php?pid=2159 | 
 | 
中等 | 
| 6 | 
https://codeforces.com/contest/1519/problem/D | 
 | 
较难 | 
| 7 | 
http://bailian.openjudge.cn/practice/4147?lang=en_US | 
汉诺塔 | 
简单 | 
| 8 | 
https://acm.hdu.edu.cn/showproblem.php?pid=1207 | 
4柱子汉诺塔 | 
较简单 | 
| 9 | 
https://acm.hdu.edu.cn/showproblem.php?pid=2044 | 
 | 
简单 | 
| 10 | 
https://acm.hdu.edu.cn/showproblem.php?pid=2047 | 
 | 
较简单 |