
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
Among the following four statements about algorithms, the correct one is. (Only fill in the serial number)  
(1) Some steps of an algorithm can be unclear or ambiguous to allow the algorithm to solve more problems;  
(2) A correct algorithm will definitely yield a definite result after execution;  
(3) The algorithm for solving a certain type of problem is not necessarily unique;  
(4) A correct algorithm will definitely end within a finite number of steps.

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