
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 Taizhou High School, there are $m$ students, numbered 1, 2, 3, …, $m$ ($m \in \mathbb{N}^*$), and the school offers $n$ elective courses, numbered 1, 2, 3, …, $n$ ($n \in \mathbb{N}^*$). Define the notation $a_{ij}$: if the $i$-th student takes the $j$-th course, then $a_{ij} = 1$; otherwise, $a_{ij} = 0$. If $a_{31} + a_{32} + a_{33} + … + a_{3n} = 2$, then this equation indicates that student number 3 has taken $\boxed{2}$ courses.

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