import java.io.IOException;
import java.io.InputStream;
import java.math.BigInteger;
import java.util.Arrays;
import java.util.NoSuchElementException;
import java.util.Scanner;

class Main {
	public static void main(String[] args) {
		new Main().run();
	}
	
	// (a,b),(c,d)を通る直線
	//  (b-d)x-(a-c)y+ad-bc=0
	
	double[] f(double a,double b,double c,double d) {
		return new double[]{b-d,-(a-c),a*d-b*c};
	}
	
	// ax+by+c=0
	int eval(double a,double b,double c,double x,double y) {
		return (int)Math.signum(a*x+b*y+c);
	}
	
	int cnt(int e0,int e1) {
		if(e0!=0&&e0==e1)return 0;
		else return 1;
	}
	
	void run() {
		FastScanner sc=new FastScanner();
		int N=sc.nextInt();
		double[][] x=new double[N][2];
		double[][] y=new double[N][2];
		for(int i=0;i<N;++i) {
			x[i][0]=sc.nextDouble();
			y[i][0]=sc.nextDouble();
			x[i][1]=sc.nextDouble();
			y[i][1]=sc.nextDouble();
		}
		int ans=0;
		for(int i0=0;i0<N;++i0) {
			for(int i1=0;i1<=1;++i1) {
				for(int j0=i0+1;j0<N;++j0) {
					for(int j1=0;j1<=1;++j1) {
						double[] coe=f(x[i0][i1], y[i0][i1], x[j0][j1], y[j0][j1]);
						int cur=2;
						for(int k=0;k<N;++k) {
							if(k==i0||k==j0)continue;
							int e0=eval(coe[0], coe[1], coe[2], x[k][0], y[k][0]);
							int e1=eval(coe[0], coe[1], coe[2], x[k][1], y[k][1]);
							cur+=cnt(e0, e1);
						}
						ans=Math.max(ans, cur);
					}
				}
			}
		}
		System.out.println(ans);
	}

	static void tr(Object... objects) {
		System.out.println(Arrays.deepToString(objects));
	}

}




class FastScanner {
    private final InputStream in = System.in;
    private final byte[] buffer = new byte[1024];
    private int ptr = 0;
    private int buflen = 0;
    private boolean hasNextByte() {
        if (ptr < buflen) {
            return true;
        }else{
            ptr = 0;
            try {
                buflen = in.read(buffer);
            } catch (IOException e) {
                e.printStackTrace();
            }
            if (buflen <= 0) {
                return false;
            }
        }
        return true;
    }
    private int readByte() { if (hasNextByte()) return buffer[ptr++]; else return -1;}
    private static boolean isPrintableChar(int c) { return 33 <= c && c <= 126;}
    public boolean hasNext() { while(hasNextByte() && !isPrintableChar(buffer[ptr])) ptr++; return hasNextByte();}
    public String next() {
        if (!hasNext()) throw new NoSuchElementException();
        StringBuilder sb = new StringBuilder();
        int b = readByte();
        while(isPrintableChar(b)) {
            sb.appendCodePoint(b);
            b = readByte();
        }
        return sb.toString();
    }
    public long nextLong() {
        if (!hasNext()) throw new NoSuchElementException();
        long n = 0;
        boolean minus = false;
        int b = readByte();
        if (b == '-') {
            minus = true;
            b = readByte();
        }
        if (b < '0' || '9' < b) {
            throw new NumberFormatException();
        }
        while(true){
            if ('0' <= b && b <= '9') {
                n *= 10;
                n += b - '0';
            }else if(b == -1 || !isPrintableChar(b)){
                return minus ? -n : n;
            }else{
                throw new NumberFormatException();
            }
            b = readByte();
        }
    }
    public int nextInt() {
        long nl = nextLong();
        if (nl < Integer.MIN_VALUE || nl > Integer.MAX_VALUE) throw new NumberFormatException();
        return (int) nl;
    }
    public double nextDouble() { return Double.parseDouble(next());}
}