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[Problem B
| 1994 East-Central Regional problem set
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1994 East-Central Regionals of the ACM International Collegiate Programming Contest
Problem A
Lining Up
"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 y over the area once in a
straight line, and she had to y 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!
Input
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.
Output
The output consists of one integer representing the largest number of
points that all lie on one line.
Sample Input
1 1
2 2
3 3
9 10
10 11
Sample Output
3
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Ed Karrels.
Last updated September 20, 1999