
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 four statements about algorithms below, the correct one(s) is(are)______. (Only fill in the number)
(1) Each step of an algorithm is reversible;
(2) An algorithm always yields a definite result after execution;
(3) There isn't a unique algorithm for solving a certain type of problem;
(4) An algorithm must terminate after a finite number of steps.

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