import java.util.Arrays;
import java.util.Scanner;

public class Main {
	MyScanner sc = new MyScanner();
	Scanner sc2 = new Scanner(System.in);
	long start = System.currentTimeMillis();
	long fin = System.currentTimeMillis();
	final int MOD = 1000000007;
	int[] dx = { 1, 0, 0, -1 };
	int[] dy = { 0, 1, -1, 0 };

	int N;
	Point[][] p;

	void run() {
		N = sc.nextInt();
		p = pointArray(N);
		int max = N >=2 ? 2: 1;
		for (int i = 0; i < N; i++) {
			Point o1 = p[i][0];
			Point o2 = p[i][1];

			for (int j = 0; j < N; j++) {
				if (i == j)
					continue;
				Point p1 = p[j][0];
				Point p2 = p[j][1];

				max = Math.max(max, crossCnt(o1, p1, i, j));
				max = Math.max(max, crossCnt(o1, p2, i, j));
				max = Math.max(max, crossCnt(o2, p1, i, j));
				max = Math.max(max, crossCnt(o2, p2, i, j));
			}
		}
		System.out.println(max);
	}

	int crossCnt(Point s, Point t, int non1, int non2) {
		int cnt = 0;
		for (int i = 0; i < N; i++) {
			if (i == non1 || i == non2)
				continue;
			if (lineCross(s, t, p[i][0], p[i][1])) {
				cnt++;
			}
		}
		return cnt;
	}

	boolean lineCross(Point p1, Point p2, Point p3, Point p4) {
		double a = (p1.x - p2.x) * (p3.y - p1.y) + (p1.y - p2.y)
				* (p1.x - p3.x);
		double b = (p1.x - p2.x) * (p4.y - p1.y) + (p1.y - p2.y)
				* (p1.x - p4.x);
		double c = (p3.x - p4.x) * (p1.y - p3.y) + (p3.y - p4.y)
				* (p3.x - p1.x);
		double d = (p3.x - p4.x) * (p2.y - p3.y) + (p3.y - p4.y)
				* (p3.x - p2.x);
		return a * b <= 0 ||  c * d <= 0;
	}

	class Point implements Comparable<Point> {
		double x;
		double y;

		public Point(double x, double y) {
			super();
			this.x = x;
			this.y = y;
		}

		@Override
		public int compareTo(Point arg0) {
			if (this.x == arg0.x)
				return this.y - arg0.y > 0 ? 1 : -1;
			if (this.x - arg0.x > 0)
				return 1;
			else
				return -1;
		}
	}

	public Point[][] pointArray(int n) {
		Point[][] res = new Point[n][2];
		for (int i = 0; i < n; i++) {
			res[i][0] = new Point(sc.nextDouble(), sc.nextDouble());
			res[i][1] = new Point(sc.nextDouble(), sc.nextDouble());
		}
		return res;
	}

	public static void main(String[] args) {
		new Main().run();
	}

	void debug(Object... o) {
		System.out.println(Arrays.deepToString(o));
	}

	void debug2(int[][] array) {
		for (int i = 0; i < array.length; i++) {
			for (int j = 0; j < array[i].length; j++) {
				System.out.print(array[i][j]);
			}
			System.out.println();
		}
	}

	boolean inner(int h, int w, int limH, int limW) {
		return 0 <= h && h < limH && 0 <= w && w < limW;
	}

	void swap(int[] x, int a, int b) {
		int tmp = x[a];
		x[a] = x[b];
		x[b] = tmp;
	}

	// find minimum i (a[i] >= border)
	int lower_bound(int a[], int border) {
		int l = -1;
		int r = a.length;
		while (r - l > 1) {
			int mid = (l + r) / 2;
			if (border <= a[mid]) {
				r = mid;
			} else {
				l = mid;
			}
		}
		// r = l + 1
		return r;
	}

	boolean palindrome(String s) {
		for (int i = 0; i < s.length() / 2; i++) {
			if (s.charAt(i) != s.charAt(s.length() - 1 - i)) {
				return false;
			}
		}
		return true;
	}

	class MyScanner {
		int nextInt() {
			try {
				int c = System.in.read();
				while (c != '-' && (c < '0' || '9' < c))
					c = System.in.read();
				if (c == '-')
					return -nextInt();
				int res = 0;
				do {
					res *= 10;
					res += c - '0';
					c = System.in.read();
				} while ('0' <= c && c <= '9');
				return res;
			} catch (Exception e) {
				return -1;
			}
		}

		double nextDouble() {
			return Double.parseDouble(next());
		}

		long nextLong() {
			return Long.parseLong(next());
		}

		String next() {
			try {
				StringBuilder res = new StringBuilder("");
				int c = System.in.read();
				while (Character.isWhitespace(c))
					c = System.in.read();
				do {
					res.append((char) c);
				} while (!Character.isWhitespace(c = System.in.read()));
				return res.toString();
			} catch (Exception e) {
				return null;
			}
		}

		int[] nextIntArray(int n) {
			int[] in = new int[n];
			for (int i = 0; i < n; i++) {
				in[i] = nextInt();
			}
			return in;
		}

		int[][] nextInt2dArray(int n, int m) {
			int[][] in = new int[n][m];
			for (int i = 0; i < n; i++) {
				in[i] = nextIntArray(m);
			}
			return in;
		}

		double[] nextDoubleArray(int n) {
			double[] in = new double[n];
			for (int i = 0; i < n; i++) {
				in[i] = nextDouble();
			}
			return in;
		}

		long[] nextLongArray(int n) {
			long[] in = new long[n];
			for (int i = 0; i < n; i++) {
				in[i] = nextLong();
			}
			return in;
		}

		char[][] nextCharField(int n, int m) {
			char[][] in = new char[n][m];
			for (int i = 0; i < n; i++) {
				String s = sc.next();
				for (int j = 0; j < m; j++) {
					in[i][j] = s.charAt(j);
				}
			}
			return in;
		}
	}
}