Heshen's Account Book
Jin Yong’s Wukong Ranking List
Pythagorean triple
Frog and Portal
Xor 2
The Kth Largest Value
Solving Equations is Easy
Approximate Matching
Palindromes
Rikka with Triangles
来源：oschina
链接：https://my.oschina.net/u/4336234/blog/3441306