N = int(input())
lsxy = []
for i in range(N):
    lsxy.append(list(map(int,input().split())))
ans = 0
for i in range(N-1):
    for j in range(i+1,N):
        cnt = 2
        if lsxy[i][0] == lsxy[j][0]:
            for k in range(N):
                if k == i or k == j:
                    continue
                if lsxy[k][0] == lsxy[i][0]:
                    cnt += 1
        else:
            f = (lsxy[i][1] - lsxy[j][1])/(lsxy[i][0] - lsxy[j][0])
            for k in range(N):
                if  k == i or k == j:
                    continue
                if lsxy[i][0] == lsxy[k][0]:
                    continue
                if f == (lsxy[i][1] - lsxy[k][1])/(lsxy[i][0] - lsxy[k][0]):
                    cnt += 1
        ans = max(ans,cnt)
print(ans)