FA-94670 / Exam timetabling constraints / Member archive

Shorter clashing exam sat first · case 05

The long exam starts late in the day and overruns.

Member previewVariant 5 · 3 implementations · 8 checks per implementation

Case contract

Each clash [student, exam a, exam b] shares a start time. The longer exam is sat first (ties by id), then a 15-minute supervised break, then the second exam. Return [student, first, second, second start, whether the second exam ends by day_end (inclusive)].

Why this case matters

Clash resolution by supervised sequential sitting is a standard timetabling fallback.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
regression: longer first 1	`[["s3", "A", "B", 855, true], ["s1", "A", "B", 855, true]]`	`[["s3", "B", "A", 885, true], ["s1", "B", "A", 885, true]]`	Failed

MEMBER ARCHIVE

The complete case is available to members.

This record includes three runnable implementations, regression fixtures, execution results, and source hashes.

Member access is invitation-based. Sign in with your invited account to inspect the sources.