using System;
using System.Collections.Generic;
using System.Linq;
using System.IO;
using System.Text;
using static System.Math;
using static System.Array;
using static AtCoder.Tool;
namespace AtCoder
{
    class AC
    {
        const int MOD = 1000000007;
        const int INF = int.MaxValue / 2;
        const long SINF = long.MaxValue / 2;
        const double EPS = 1e-8;
        static readonly int[] dI = { 0, 1, 0, -1 };
        static readonly int[] dJ = { 1, 0, -1, 0 };
        //static List<List<int>> G = new List<List<int>>();
        //static List<List<Edge>>G = new List<List<Edge>>();
        //static List<Edge> E = new List<Edge>();
        static void Main(string[] args)
        {
            //var sw = new StreamWriter(Console.OpenStandardOutput()) { AutoFlush = false };
            //Console.SetOut(sw);
            var cin = new Scanner();
           
            const int mod = 1000003;
            while (true)
            {
                var input = cin.ReadSplitInt();
                int n = input[0];
                int m = input[1];
                if (n == 0) { return; }
                if (n % 2 == 1) { Console.WriteLine(0);continue; }
                var E = new List<Tuple<int, int>>();
                for(var i = 0; i < m; i++)
                {
                    var p = cin.ReadSplitInt();
                    p[0]--;p[1]--;
                    if (Abs(p[0] - p[1]) % 2 == 0) { continue; }
                    E.Add(new Tuple<int, int>(Min(p[0], p[1]), Abs(p[0] - p[1])));
                }
                E.Add(new Tuple<int, int>(0, n - 1));
                E.Sort((x, y) =>
                {
                    long dif = x.Item2 - y.Item2;
                    return dif == 0 ? 0 : (dif > 0 ? 1 : -1);
                });
                var dp = new Tuple<int, long>[n];
                for (var i = 0; i < n - 1; i++)
                {
                    dp[i] = new Tuple<int, long>(i + 1, 1);
                }
                foreach(var e in E)
                {
                    int l = e.Item1;
                    int r = e.Item1 + e.Item2;

                    long sum = 0;
                    long ad1 = 1;
                    int nx = l + 1;
                    while (nx < r - 1)
                    {
                        ad1 *= dp[nx].Item2;
                        ad1 %= mod;
                        nx = dp[nx].Item1 + 1;
                    }
                    sum += ad1;
                    sum %= mod;

                    nx = l;
                    long ad2 = 1;
                    while (nx < r)
                    {
                        ad2 *= dp[nx].Item2;
                        ad2 %= mod;
                        nx = dp[nx].Item1 + 1;
                    }
                    sum += ad2;
                    sum %= mod;


                    dp[l] = new Tuple<int, long>(r, sum);
                }
                Console.WriteLine(dp[0].Item2);
            }

            //Console.Out.Flush();
        }
        struct Edge
        {
            public int from;

            public int to;
            public long dist;
            public Edge(int t, long c)
            {
                from = -1;
                to = t;
                dist = c;
            }
            public Edge(int f, int t, long c)
            {
                from = f;
                to = t;
                dist = c;
            }

        }
    }
    
    public class Scanner
    {
        public int[] ReadSplitInt()
        {
            return ConvertAll(Console.ReadLine().Split(), int.Parse);
        }
        public long[] ReadSplitLong()
        {
            return ConvertAll(Console.ReadLine().Split(), long.Parse);
        }
        public double[] ReadSplit_Double()
        {
            return ConvertAll(Console.ReadLine().Split(), double.Parse);
        }
    }
    public static class Tool
    {
        static public void Initialize<T>(ref T[] array, T initialvalue)
        {
            for (var i = 0; i < array.Length; i++)
            {
                array[i] = initialvalue;
            }
        }
        static public void Swap<T>(ref T a, ref T b)
        {
            T keep = a;
            a = b;
            b = keep;
        }

        static public void Display<T>(T[,] array2d, int n, int m)
        {
            for (var i = 0; i < n; i++)
            {
                for (var j = 0; j < m; j++)
                {
                    Console.Write($"{array2d[i, j]} ");
                }
                Console.WriteLine();
            }
        }

        static public long LPow(int a, int b)
        {
            return (long)Pow(a, b);
        }
    }
    class Modulo
    {
        private const int M = 1000000007;
        private readonly int[] m_facs;
        public int Mul(int a, int b)
        {
            return (int)(Math.BigMul(a, b) % M);
        }
        public Modulo(int n)
        {
            m_facs = new int[n + 1];
            m_facs[0] = 1;
            for (int i = 1; i <= n; ++i)
            {
                m_facs[i] = Mul(m_facs[i - 1], i);
            }
        }
        public int Fac(int n)
        {
            return m_facs[n];
        }
        public int Pow(int a, int m)
        {
            switch (m)
            {
                case 0:
                    return 1;
                case 1:
                    return a;
                default:
                    int p1 = Pow(a, m / 2);
                    int p2 = Mul(p1, p1);
                    return ((m % 2) == 0) ? p2 : Mul(p2, a);
            }
        }
        public int Div(int a, int b)
        {
            return Mul(a, Pow(b, M - 2));
        }
        public int Ncr(int n, int r)
        {
            if (n < r) { return 0; }
            if (n == r) { return 1; }
            int res = Fac(n);
            res = Div(res, Fac(r));
            res = Div(res, Fac(n - r));
            return res;
        }
        public Modulo() { }
    }
}



Measured memory_bytes: 29440