
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
In each cell of a $15 \times 15$ table, the number $-1, 0,$ or $+1$ is written such that the sum of the numbers in any row is nonpositive and the sum of the numbers in any column is nonnegative. What is the minimum number of zeros that can be written in the cells of the table?

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