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Problem 1732 wzc's problem

Accept: 72    Submit: 163
Time Limit: 1000 mSec    Memory Limit : 32768 KB

Problem Description

There are N points in the plane,wzc wants to know how many squares that can be formed within the points set.

Input

There are multiple test cases.
For each case, the first line is a integers N (4<= N <= 50),the number of points in the plane.
Followed by N lines,each lines with two integers Xi,Yi(0<=Xi<=100,0<=Yi<=100),which is the position of the ith point.
Note that no two point will be the same.

Output

For each test case, output the number of squares that you can find in the plane.

Sample Input

4 0 0 0 1 1 0 1 1 4 1 2 2 1 1 0 0 1

Sample Output

1 1

Source

FZU 2009 Summer Training Qualification -- Hero Revival 2

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