| 1 | Domino Covering |
| 2 | 反回文串 |
| 3 | 旧试题 |
| 4 | 遗忘的集合 |
| 5 | Always Online |
| 6 | Beautiful Now |
| 7 | Call It What You Want |
| 8 | Daylight |
| 9 | Everything Has Changed |
| 10 | Fireflies |
| 11 | Glad You Came |
| 12 | Hills And Valleys |
| 13 | Innocence |
| 14 | Just So You Know |
| 15 | Kaleidoscope |
| 16 | Lost In The Echo |
| 17 | Rikka with Data Structures |
| 18 | Rikka with Nice Counting Striking Back |
| 19 | Rainbow Graph |
| 20 | Let the Flames Begin |
| 21 | Crazy Cake |
| 22 | Best Player |
| 23 | Lucky Sequence |
| 24 | The Answer! |
| 25 | Array |
| 26 | Chiaki Chain |
| 27 | Cut the Plane |
| 28 | Edges Counting |
| 29 | Equanimous |
| 30 | Fighting Against Monsters |
| 31 | Mysterious Triple Sequence |
| 32 | Counting Polygons |
| 33 | Square Graph |
| 34 | Three Dimensions |
| 35 | Almost Prefix Concatenation |
| 36 | GCD of Pattern Matching |
| 37 | 划分数字 |
| 38 | Dot Product Game |
| 39 | Growing Tree |
