
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 a big box, there is a medium box, and inside the medium box, there is a small box. 100 balls are placed in the boxes. Let $n$ be the number of balls in the big box but not in the medium box, and $m$ be the number of balls in the medium box but not in the small box. Using $m$ and $n$, determine the number of balls in the small box.

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