**59 人解决**，80 人已尝试。

**101 份提交通过**，共有 258 份提交。

**3.8** EMB 奖励。

**单点时限: **2.0 sec

**内存限制: **256 MB

``How am I ever going to solve this problem?” said the pilot.

Indeed, the pilot was not facing an easy task. She had to drop packages at specific points scattered in a dangerous area. Furthermore, the pilot could only fly over the area once in a straight line, and she had to fly over as many points as possible. All points were given by means of integer coordinates in a two-dimensional space. The pilot wanted to know the largest number of points from the given set that all lie on one line. Can you write a program that calculates this number?

Your program has to be efficient!

The input consists of N pairs of integers, where 1 < N < 700. Each pair of integers is separated by one blank and ended by a new-line character. The list of pairs is ended with an end-of-file character. No pair will occur twice.

The input ends with a case which N is equal to zero

The output consists of one integer representing the largest number of points that all lie on one line.

Input

5 1 1 2 2 3 3 9 10 10 11 0

Output

3

**59 人解决**，80 人已尝试。

**101 份提交通过**，共有 258 份提交。

**3.8** EMB 奖励。

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