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

ans = 0
for i in range(N):
    
    for j in range(i+1,N):
        cnt = 0
        dx = XY[j][0] - XY[i][0]
        dy = XY[j][1] - XY[i][1]
        #print(dx,dy)
        for k in range(N):
            
            dx2 = XY[k][0] - XY[i][0]
            dy2 = XY[k][1] - XY[i][1]
            #print(dy*dx2,dx*dy2)
            if dy*dx2 == dx*dy2:
                cnt += 1
                #print(cnt)
                ans = max(ans,cnt)
print(ans)