
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
Given the function \( f: \mathbf{R} \rightarrow \mathbf{R} \) where we know that \( f(1)=0 \), and for any two real numbers \( (x, y) \), it holds that \( |f(x)-f(y)|=|x-y| \). Determine the function \( f \).

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