
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
Participants in a race must start at point $A$, touch any part of a 1600-meter long wall, and then stop at point $B$. Determine the minimum distance a runner must cover, rounding to the nearest meter. The diagram dimensions are as follows: From $A$ directly to the horizontal wall is 400 meters, the wall's length is 1600 meters, and the vertical distance from the base line opposite $A$ to point $B$ is 600 meters.

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