
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
A bus has 78 seats and departs empty. At the first stop, one passenger boards; at the second stop, two passengers board; at the third stop, three passengers board, and so on. After how many stops will the bus be full?

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