
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
When the input is $a=3$, $b=-1$, $n=5$, after executing the following program statements, the output is $c=\ $.

```
Read a, b, n
i←1
While i≤n-2
c←a+b
a←b
b←c
i←i+1
End While
Print c
End.
```

Present the answer in LaTex format: \boxed{Your answer}
user