
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
Let  $ABC$  be an equilateral triangle. Find all positive integers  $n$ , for which the function  $f$ , defined on all points  $M$  from the circle  $S$  circumscribed to triangle  $ABC$ , defined by the formula  $f:S \rightarrow R, f(M)=MA^n+MB^n+MC^n$ , is a constant function.

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