# RE8 | z-ai/glm-5.2 | run 1

## Prompt

Minimize total time to finish these tasks, one at a time, respecting dependencies: A (2h, no deps); B (3h, needs A); C (1h, no deps); D (2h, needs B and C). Give a valid order and the total time.

## Response

Minimum total time is **8 hours**, since all tasks are done one at a time and their durations sum to \(2+3+1+2=8\) hours. The dependencies do not force any idle time, so 8 hours is optimal.

**Valid order:** A → C → B → D

| Task | Time Interval |
|------|---------------|
| A | 0–2 h |
| C | 2–3 h |
| B | 3–6 h |
| D | 6–8 h |

This respects A before B, and both B and C before D.

Would you like a version that minimizes completion time if parallel work were allowed?
