
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
At a national conference, 30 scientists are accommodated in the same hotel. They are assigned rooms number 1 through 30. Due to last-minute changes, scientists assigned to rooms numbered 15, 20, and 25 could not attend. What is the median room number of the remaining 27 scientists?

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