| Problem ID | Title | Source/Category | AC | Submit | |
| 1277 Problem A | K-ary tree | 26 | 98 | ||
| 1278 Problem B | Find the depth | 20 | 96 | ||
| 1279 Problem C | Pre, in and post | 20 | 39 | ||
| 1280 Problem D | Cut the stick | 24 | 60 | ||
| 1281 Problem E | Cut a tree | 17 | 24 | ||
| 1240 Problem F | K people travel on a tree | 2 |