
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
Dima lives in a nine-story building. It takes him 1 minute to descend from his floor to the first floor using the elevator. Due to his short height, Dima cannot reach the button for his own floor. Therefore, when going back up, he presses the button he can reach and then continues on foot. The entire journey upstairs takes 1 minute and 10 seconds. The elevator travels up and down at the same speed, and Dima climbs up the stairs at half the speed of the elevator. On which floor does Dima live?

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