Artificial intelligence
What is the evaluation function in A* approach?

Average of Path cost from start node to current node and Heuristic cost
Heuristic function
Path cost from start node to current node
Path cost from start node to current node + Heuristic cost

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Artificial intelligence
What is a heuristic function?

A function which takes parameters of type string and returns an integer value
A function whose return type is nothing
A function to solve mathematical problems
A function that maps from problem state descriptions to measures of desirability

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