- A - Flying to the Mars
- B - Censor
- C - Matrix Matcher
- D - Palindromic characteristics
- E - 最长回文
- F - Girls' research
- G - Assign the task
- H - 统计难题
- I - Hardwood Species
- J - Remember the Word
- K - Oulipo
- L - Number Sequence
- M - Keywords Search
- N - 病毒侵袭持续中
- O - Stammering Aliens
- P - Musical Theme
- Q - Power Strings
- R - Long Long Message
- S - The Number of the Same BST
- T - Longest Common Substring
- U - Longest Common Substring II
- V - Count on a trie
- W - Common Substrings
- X - Good Article Good sentence