ans=0
N=int(input())
XY=[list(map(int,input().split())) for _ in range(N)]
for i in range(N-1):
    x1,y1=XY[i][0],XY[i][1]
    for j in range(i+1,N):
        x2,y2=XY[j][0],XY[j][1]
        if x1==x2:
            cnt=0
            for k in range(N):
                cnt+=XY[k][0]==x1
        else:
            cnt=0
            for k in range(N):
                x3,y3=XY[k][0],XY[k][1]
                cnt+=(y3-y1)==(y2-y1)*(x3-x1)/(x2-x1)
        ans=max(ans,cnt)
print(ans)