| | A | {A} + {B} | hdu计算机学院ACM大学生程序设计竞赛（2006’5） | 2 | 8 |
| | B | How many students take the elective course? | yehr | 2 | 2 |
| | C | IBM Minus One | Southwestern Europe 1997, Practice | 4 | 11 |
| | D | Climbing Worm | East Central North America 2002 practice | 5 | 7 |
| | E | A Simple Question of Chemistry | Mid-Atlantic 2002 | 5 | 6 |
| | F | josephus问题 | yhr | 1 | 3 |
| | G | Encoding | Zhejiang Provincial Programming Contest 2005 | 3 | 14 |
| | H | Word Reversal | Shanghai Jiaotong University Programming Contest 2004 | 4 | 4 |
| | I | Reverse The Sequence | Shanghai Jiaotong University Programming Contest 2004,Practice Session | 4 | 4 |
| | J | Savings Account | Rocky Mountain 2006, Practice | 3 | 3 |
| | K | GPA | Rocky Mountain 2006, Practice | 3 | 4 |
| | L | Heritage from father | hdu1178 | 3 | 28 |
| | M | Prime Factor | hdu | 5 | 18 |
| | N | Delete Number | yhr | 2 | 29 |
| | O | Booklet Printing | Mid-Central USA 1998 | 2 | 7 |