using System;
using System.Collections.Generic;
using System.Linq;

public class Program
{
    private int R, C, N;
    private int[] X1, Y1, X2, Y2, Num1, Num2;

    private Random Rnd;

    public void Solve()
    {
        var sc = new Scanner();
        R = sc.NextInt();
        C = sc.NextInt();
        N = sc.NextInt();
        X1 = new int[N];
        Y1 = new int[N];
        X2 = new int[N];
        Y2 = new int[N];
        for (int i = 0; i < N; i++)
        {
            X1[i] = sc.NextInt();
            Y1[i] = sc.NextInt();
            X2[i] = sc.NextInt();
            Y2[i] = sc.NextInt();
        }

        Num1 = new int[N];
        Num2 = new int[N];
        Rnd = new Random();
        List<int> ls = new List<int>();
        for (int i = 0; i < N; i++)
        {
            bool a = X1[i] == 0 || X1[i] == R || Y1[i] == 0 || Y1[i] == C;
            bool b = X2[i] == 0 || X2[i] == R || Y2[i] == 0 || Y2[i] == C;
            if (a && b)
            {
                ls.Add(i);
                Num1[i] = ToNum(X1[i], Y1[i]);
                Num2[i] = ToNum(X2[i], Y2[i]);
            }
        }

        Console.WriteLine(Check(ls) ? "YES" : "NO");
    }

    private int ToNum(int x, int y)
    {
        // (0,i) = i
        if (x == 0)
        {
            return y;
        }

        // (i, C) = C + i
        if (y == C)
        {
            return C + x;
        }

        // (R,i) = C + R + C-i
        if (x == R)
        {
            return C + R + C - y;
        }

        // (i,0) = C + R + C + R-i
        if (y == 0)
        {
            return C + R + C + R - x;
        }

        return -1;
    }

    private bool Check(List<int> ls)
    {
        if (ls.Count <= 1)
            return true;
        int r = Rnd.Next(ls.Count);

        List<int> aa = new List<int>();

        List<int> bb = new List<int>();

        int max = Math.Max(Num1[ls[r]], Num2[ls[r]]);
        int min = Math.Min(Num1[ls[r]], Num2[ls[r]]);

        foreach (var i in ls)
        {
            if (i == ls[r]) continue;

            bool a = min < Num1[i] && Num1[i] < max;
            bool b = min < Num2[i] && Num2[i] < max;

            if (a ^ b)
                return false;

            if (a)
                aa.Add(i);
            else
                bb.Add(i);
        }

        return Check(aa) && Check(bb);
    }


    public static void Main(string[] args)
    {
        new Program().Solve();
    }
}

class Scanner
{
    public Scanner()
    {
        _pos = 0;
        _line = new string[0];
    }

    const char Separator = ' ';
    private int _pos;
    private string[] _line;

    #region スペース区切りで取得

    public string Next()
    {
        if (_pos >= _line.Length)
        {
            _line = Console.ReadLine().Split(Separator);
            _pos = 0;
        }

        return _line[_pos++];
    }

    public int NextInt()
    {
        return int.Parse(Next());
    }

    public long NextLong()
    {
        return long.Parse(Next());
    }

    public double NextDouble()
    {
        return double.Parse(Next());
    }

    #endregion

    #region 型変換

    private int[] ToIntArray(string[] array)
    {
        var result = new int[array.Length];
        for (int i = 0; i < array.Length; i++)
        {
            result[i] = int.Parse(array[i]);
        }

        return result;
    }

    private long[] ToLongArray(string[] array)
    {
        var result = new long[array.Length];
        for (int i = 0; i < array.Length; i++)
        {
            result[i] = long.Parse(array[i]);
        }

        return result;
    }

    private double[] ToDoubleArray(string[] array)
    {
        var result = new double[array.Length];
        for (int i = 0; i < array.Length; i++)
        {
            result[i] = double.Parse(array[i]);
        }

        return result;
    }

    #endregion

    #region 配列取得

    public string[] Array()
    {
        if (_pos >= _line.Length)
            _line = Console.ReadLine().Split(Separator);
        _pos = _line.Length;
        return _line;
    }

    public int[] IntArray()
    {
        return ToIntArray(Array());
    }

    public long[] LongArray()
    {
        return ToLongArray(Array());
    }

    public double[] DoubleArray()
    {
        return ToDoubleArray(Array());
    }

    #endregion
}

Measured memory_bytes: 45656