from collections import Counter

import sys


def input(): return sys.stdin.readline().rstrip('\n')


def main():
    n = int(input())
    xy = [tuple(map(int, input().split())) for _ in range(n)]
    ans = 0
    for i in range(n):
        for j in range(i):
            xi, yi = xy[i]
            xj, yj = xy[j]
            dx, dy = xi-xj, yi-yj

            c = Counter([dy*x-dx*y for x, y in xy])
            for k, v in c.items():
                ans = max(ans, v)

    print(ans)


if __name__ == '__main__':
    main()