FA-94679 / Exam timetabling constraints / Member archive

Second sitting ending exactly at close flagged infeasible · case 04

Sittings that finish at the building closing time are rejected.

Member previewVariant 4 · 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: day end inclusive 1	`[["s1", "A", "B", 735, false]]`	`[["s1", "A", "B", 735, 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.