
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 \( n > 0 \) be an integer. Each of the \( n \) girls in a group is the only one who knows a certain piece of gossip. To share their information, they call each other two at a time, but each time only one speaks and the other just listens to all the information that her friend transmits.

Determine the minimum number of phone calls necessary so that each girl knows all the gossip.

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