# RE8 | z-ai/glm-5.2 | run 2

## 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

A valid order is **A → C → B → D**, and the total time is **8 hours**.

## Reasoning

Since all tasks are performed one at a time, the total time is simply the sum of all durations, independent of order:

\[ 2 + 3 + 1 + 2 = 8 \text{ hours} \]

The order only needs to respect dependencies: A before B, and both B and C before D.

| Order | Valid? | Total Time |
|---|---|---|
| A → B → C → D | Yes | 8h |
| A → C → B → D | Yes | 8h |
| C → A → B → D | Yes | 8h |

Any of these sequences finishes in 8h; no ordering can reduce it because the tasks are sequential.

**Chosen schedule: A (2h) → C (1h) → B (3h) → D (2h) = 8h**

Would you like the schedule analysis if parallel execution were allowed instead?
