N=int(input())
coords=list()
for i in range(N):
    X,Y=map(int,input().split())
    coords.append(complex(X,Y))

ans=2
ds=dict()
for i in range(0,N):
    for j in range(i+1,N):
        ds[(i,j)]=2
        for k in range(j+1,N):
            if ((coords[j]-coords[i])*(coords[k]-coords[i]).conjugate()).imag==0:
                    ds[(i,j)]+=1

print(max(ds.values()))