
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
During the Arbor Day, 20 students in a class planted trees along one side of a straight road, with each student planting one tree 10 meters apart from each other. Initially, the saplings need to be centrally located next to one of the tree pits so that the total sum of the distances walked back and forth by each student to retrieve their sapling and return to their respective tree pit is minimized. The minimum total distance walked is ______ meters.

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