| # Equivalent Program Pair Search | |
| Each instance contains 200 anonymous Python programs. The task is to identify | |
| every disjoint pair implementing the same input-output specification, including | |
| boundary and edge-case behavior. Similar-looking mutants create hard negative | |
| candidates, while true pairs may use different implementation styles. | |
| The prediction is a JSON array of integer pairs. Pair members and the outer list | |
| must be sorted numerically. Primary exact accuracy requires the complete pair | |
| set with no extras. | |