
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 \(\lfloor x \rfloor\) denote the greatest integer less than or equal to the real number \(x\). Find all positive integers \(M\) such that the sequence defined by
\[
\begin{array}{l}
a_{0}=\frac{2 M+1}{2}, \\
a_{k+1}=a_{k}\left\lfloor a_{k}\right\rfloor(k=0,1, \cdots)
\end{array}
\]
contains at least one integer term.

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