---
language:
- en
---

notes: some examples appear to be contaminated (examples are contained in test cases)

# Filtering
1) selected_incorrect: filter to Python3 family + verdict == WRONG_ANSWER
2) selected_accepted: keep first Python3 family correct reference per problem_id in the above set, otherwise drop row
3) verifiable: keep rows whose id is in the above set
4) apply final filters: no interaction, input mode == stdio, executable.

```
[Stage 1] selected_incorrect processed=18097 kept_after_filters=8363 unique_problem_ids=1778
[Stage 2] default processed_total=12591518 kept_lang_ok=745330 considered_in_target=119338 replacements=13707                                                                                                                         
[Stage 2] coverage: full=1131 partial=249 zero=398 total_kept_candidates=6802
[Stage 3] verifiable processed=8760 matched_problem_ids=1693                                                                                                                                                                          
[Stage 4] incorrect_tmp_rows=8363 joined_ok=7218 dropped_no_correct=915 dropped_no_verifiable=230                                                                                                                                     
[Stage 4] before_final_filters=7218 dropped_interaction_present=0 dropped_rating=0 dropped_input_mode=76 dropped_executable=0 final_written=7142                                                                                      
[Stage 4] pairing duplicates_used_rows=646 problems_with_insufficient_corrects=249
```