import sys
input = sys.stdin.readline
from collections import *

N = int(input())
xy = [tuple(map(int, input().split())) for _ in range(N)]
ans = 0

for i in range(N):
    xi, yi = xy[i]
    
    for j in range(i+1, N):
        xj, yj = xy[j]
        ans_cand = 0
        
        for k in range(N):
            xk, yk = xy[k]
            
            if (yj-yi)*(xk-xj)==(yk-yj)*(xj-xi):
                ans_cand += 1
        
        ans = max(ans, ans_cand)

print(ans)