
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
Class 3(1) has a total of 45 students. In the midterm exam, there are two subjects: Chinese and Mathematics. Each student excels in at least one subject. Among them, 34 students excel in Chinese, and 39 students excel in Mathematics. The number of students who excel in both subjects is     .

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