Algorithm 面试题与答案
问题 46. How does the A* algorithm work?
A* (A-star) is a pathfinding algorithm that uses a combination of the cost to reach a node and an estimate of the cost to reach the goal from that node. It prioritizes nodes with lower total cost.
问题 47. What is a trie data structure?
A trie is a tree-like data structure that is used to store a dynamic set or associative array where keys are usually strings. It allows for efficient insertion, deletion, and lookup operations.
问题 48. Explain the concept of divide and conquer.
Divide and conquer is a problem-solving strategy that involves breaking a problem into smaller subproblems, solving each subproblem independently, and then combining the solutions to solve the original problem.
问题 49. What is the difference between depth-first search and breadth-first search?
DFS explores as far as possible along each branch before backtracking, while BFS explores nodes level by level. DFS uses a stack or recursion, and BFS uses a queue.
问题 50. How does the Merge Sort algorithm work?
Merge Sort is a divide and conquer algorithm that divides the input array into two halves, recursively sorts each half, and then merges the sorted halves to produce a sorted array.
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