| Name | Lines of code | Maintainability | Test coverage |
| vj4/ui/components/autocomplete/index.js | 176 | A 1 hr | |
| vj4/handler/judge.py | 177 | A 0 mins | |
| vj4/model/record.py | 179 | A 2 hrs | |
| vj4/job/num.py | 184 | A 0 mins | |
| vj4/handler/record.py | 213 | A 0 mins | |
| vj4/handler/user.py | 220 | A 25 mins | |
| scripts/build/config/webpack.js | 220 | C 1 day | |
| vj4/handler/training.py | 222 | A 25 mins | |
| vj4/model/adaptor/discussion.py | 230 | A 25 mins | |
| vj4/ui/pages/problem_detail.page.js | 266 | A 0 mins | |
| vj4/error.py | 266 | A 2 hrs | |
| vj4/model/adaptor/problem.py | 268 | A 2 hrs | |
| vj4/handler/home.py | 269 | A 2 hrs | |
| vj4/model/domain.py | 285 | A 3 hrs | |
| vj4/handler/domain.py | 318 | A 3 hrs | |
| vj4/handler/discussion.py | 328 | A 3 hrs | |
| vj4/ui/components/calendar/index.js | 338 | F 3 days | |
| vj4/handler/contest.py | 345 | B 4 hrs | |
| vj4/model/document.py | 373 | B 4 hrs | |
| vj4/handler/homework.py | 394 | B 5 hrs | |
| vj4/handler/base.py | 424 | C 1 day | |
| vj4/model/adaptor/contest.py | 491 | D 2 days | |
| vj4/model/builtin.py | 498 | D 2 days | |
| vj4/handler/problem.py | 718 | D 1 day |