import math
from collections import Counter
def yakubun(a,b):
    g = math.gcd(a,b)
    return (a//g,b//g)
ans = 0
N = int(input())
XY = [[int(hoge) for hoge in input().split()] for n in range(N)]
for s in range(N-1):
    sx,sy = XY[s]
    G = [yakubun(gx-sx,gy-sy) for gx,gy in XY[s+1:]]
    C = Counter(G)
    ans = max(ans,1 + max(C.values()))
print(ans)