# RE8 | openai/gpt-5.4-mini | 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**. With dependencies respected and tasks done one at a time, the **total time is 8 hours**.

## Timeline
- **A**: 2h
- **C**: 1h
- **B**: 3h
- **D**: 2h

## Check
- B starts after A
- D starts after both B and C
- Total \( 2 + 1 + 3 + 2 = 8 \) hours

Would you like the same answer shown as a dependency graph or Gantt-style timeline?
