n=int(input())
l=[list(map(int,input().split())) for i in range(n)]
ans=0
for i in range(n):
    for j in range(i+1,n):
        x1,y1=l[i]
        x2,y2=l[j]
        tmp=0
        for x3,y3 in l:
            if (y3-y1)*(x2-x1)==(y2-y1)*(x3-x1):
                tmp+=1
        ans=max(tmp,ans)
print(ans)