直角三角形 - 题目

#17107. 直角三角形

统计

AI Translation — This statement was translated using AI and may contain inaccuracies. Please refer to the original statement if in doubt.

在坐标平面上放置了 $N$ 个点。

编写一个程序，计算由给定的点中的三个点可以组成多少个直角三角形。直角三角形是指其中一个角为 $90$ 度的三角形。

输入格式

输入的第一行包含一个整数 $N$ ($3 \le N \le 1500$)，表示点的数量。

接下来的 $N$ 行，每行包含一个点的坐标，为两个由空格隔开的整数。坐标的范围在 $-10^9$ 到 $10^9$ 之间。

任意两个点不会位于相同的坐标。

输出格式

输出直角三角形的数量。

样例

输入样例 1

输出样例 1

输入样例 2

输出样例 2

输入样例 3

输出样例 3

Discussions

About Discussions

The discussion section is only for posting: General Discussions (problem-solving strategies, alternative approaches), and Off-topic conversations.

This is NOT for reporting issues! If you want to report bugs or errors, please use the Issues section below.

Open Discussions 0

No discussions in this category.

Issues

About Issues

If you find any issues with the problem (statement, scoring, time/memory limits, test cases, etc.), you may submit an issue here. A problem moderator will review your issue.

Guidelines:

This is not a place to publish discussions, editorials, or requests to debug your code. Issues are only visible to you and problem moderators.
Do not submit duplicated issues.
Issues must be filed in English or Chinese only.

Active Issues 0

No issues in this category.

Closed/Resolved Issues 0