N = int(input())
ns = [tuple(map(int, input().split())) for _ in range(N)]

def is_linear(p1, p2, p3):
    return ((p1[0] - p3[0]) * (p1[1] - p2[1]) - (p1[0] - p2[0]) * (p1[1] - p3[1])) == 0

lines = [[ns[0], ns[1]]]

for i, p in enumerate(ns[2:]):
    for line in lines:
        if is_linear(*line[:2], p):
            line.append(p)
            continue
    lines.extend([[old, p] for old in ns[:i]])


print(max(len(line) for line in lines))