LeetCode --- 447. Number of Boomerangs解题报告

杨鑫newlfe

于 2019-08-29 10:50:14 发布

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分类专栏： Python LeetCode 文章标签： LeetCode Python Number of Boomerangs 算法

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本文介绍了LeetCode中第447题——Number of Boomerangs的问题，详细讲解了如何计算平面上不同点构成的回旋镖数量。内容包括题目描述、解题思路和Python实现代码，适合准备算法面试和提高编程能力的读者阅读。

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Given n points in the plane that are all pairwise distinct, a "boomerang" is a tuple of points (i, j, k) such that the distance between i and j equals the distance between i and k (the order of the tuple matters).

Find the number of boomerangs. You may assume that n will be at most 500 and coordinates of points are all in the range [-10000, 10000] (inclusive).

Example:

Input:
[[0,0],[1,0],[2,0]]

Output:
2

Explanation:
The two boomerangs are [[1,0],[0,0],[2,0]] and [[1,0],[2,0],[0,0]]

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