using System; using System.Collections.Generic; //using System.Linq; using System.IO; using System.IO.Compression; using System.Text; namespace Solver { class Program { const int M = 1000000007; const double eps = 1e-9; static int[] dd = { 0, 1, 0, -1, 0 }; static void Main() { var sw = new System.IO.StreamWriter(Console.OpenStandardOutput()) { AutoFlush = false }; // var sc = new Scan(); // int w, h, n; // sc.Multi(out w, out h, out n); var inp = Console.ReadLine().Split(); int w = int.Parse(inp[0]); int h = int.Parse(inp[1]); int n = int.Parse(inp[2]); var l = new bool[w * h][]; var dist = new int[w * h]; var th = new int[w * h][]; for (int i = 0; i < w * h; i++) { l[i] = new bool[4]; th[i] = new int[2]; dist[i] = M; } for (int i = 0; i < n; i++) { int m = int.Parse(Console.ReadLine()); var bs = Console.ReadLine().Split(); var b = new int[m + 1]; for (int j = 0; j < m + 1; j++) { b[j] = int.Parse(bs[j]); } for (int j = 0; j < m; j++) { var sm = b[j] > b[j + 1] ? b[j + 1] : b[j]; var la = b[j] > b[j + 1] ? b[j] : b[j + 1]; if (la - sm >= w) { ++th[sm][0]; --th[la][0]; } else { ++th[sm][1]; --th[la][1]; } } } for (int i = 0; i < w; ++i) { int sum = 0; for (int j = i; j < w * h; j += w) { sum += th[j][0]; if (sum > 0) { l[j][0] = true; l[j + w][2] = true; } } } for (int i = 0; i < w * h; i += w) { int sum = 0; for (int j = i; j < w + i; ++j) { sum += th[j][1]; if (sum > 0) { l[j][1] = true; l[j + 1][3] = true; } } } var q = new Queue(); dist[0] = 0; q.Enqueue(0); while (q.Count > 0) { var p = q.Dequeue(); if (p == w * h - 1) { break; } if (l[p][0] && dist[p + w] > dist[p] + 1) { dist[p + w] = dist[p] + 1; q.Enqueue(p + w); } if (l[p][1] && dist[p + 1] > dist[p] + 1) { dist[p + 1] = dist[p] + 1; q.Enqueue(p + 1); } if (l[p][2] && dist[p - w] > dist[p] + 1) { dist[p - w] = dist[p] + 1; q.Enqueue(p - w); } if (l[p][3] && dist[p - 1] > dist[p] + 1) { dist[p - 1] = dist[p] + 1; q.Enqueue(p - 1); } } if (dist[w * h - 1] >= M) sw.WriteLine("Odekakedekinai.."); else sw.WriteLine(dist[w * h - 1]); sw.Flush(); } static void swap(ref T a, ref T b) { var t = a; a = b; b = t; } static bool isprime(long n) { if (n == 1) return false; for (long i = 2; i * i <= n; i++) if (n % i == 0) return false; return true; } static string strsort(string s) { var c = s.ToCharArray(); Array.Sort(c); return string.Join("", c); } static string strswap(string s, int i, int j) { var c = s.ToCharArray(); c[i] = s[j]; c[j] = s[i]; return string.Join("", c); } static T[] copy(T[] a) { var ret = new T[a.Length]; for (int i = 0; i < a.Length; i++) ret[i] = a[i]; return ret; } } /* class Scan { public int Int { get { return int.Parse(Console.ReadLine().Trim()); } } public long Long { get { return long.Parse(Console.ReadLine().Trim()); } } public string Str { get { return Console.ReadLine().Trim(); } } public int[] IntArr { get { return Console.ReadLine().Trim().Split().Select(int.Parse).ToArray(); } } public int[] IntArrWithSep(char sep) { return Console.ReadLine().Trim().Split(sep).Select(int.Parse).ToArray(); } public long[] LongArr { get { return Console.ReadLine().Trim().Split().Select(long.Parse).ToArray(); } } public double[] DoubleArr { get { return Console.ReadLine().Split().Select(double.Parse).ToArray(); } } public string[] StrArr { get { return Console.ReadLine().Trim().Split(); } } public List IntList { get { return Console.ReadLine().Trim().Split().Select(int.Parse).ToList(); } } public List LongList { get { return Console.ReadLine().Trim().Split().Select(long.Parse).ToList(); } } public void Multi(out int a, out int b) { var arr = IntArr; a = arr[0]; b = arr[1]; } public void Multi(out int a, out int b, out int c) { var arr = IntArr; a = arr[0]; b = arr[1]; c = arr[2]; } public void Multi(out int a, out int b, out int c, out int d) { var arr = IntArr; a = arr[0]; b = arr[1]; c = arr[2]; d = arr[3]; } public void Multi(out int a, out string b) { var arr = StrArr; a = int.Parse(arr[0]); b = arr[1]; } public void Multi(out int a, out int b, out string c) { var arr = StrArr; a = int.Parse(arr[0]); b = int.Parse(arr[1]); c = arr[2]; } public void Multi(out int a, out char b) { var arr = StrArr; a = int.Parse(arr[0]); b = arr[1][0]; } public void Multi(out char a, out int b) { var arr = StrArr; a = arr[0][0]; b = int.Parse(arr[1]); } public void Multi(out long a, out long b) { var arr = LongArr; a = arr[0]; b = arr[1]; } public void Multi(out long a, out int b) { var arr = LongArr; a = arr[0]; b = (int)arr[1]; } public void Multi(out int a, out long b) { var arr = LongArr; a = (int)arr[0]; b = arr[1]; } public void Multi(out string a, out string b) { var arr = StrArr; a = arr[0]; b = arr[1]; } } class mymath { public bool isprime(long a) { if (a < 2) return false; for (long i = 2; i * i <= a; i++) if (a % i == 0) return false; return true; } public long powmod(long a, long b, long M) { if (a == 0) return 0; if (b == 0) return 1; if (b == 1) return a % M; var t = powmod(a, b / 2, M); if ((b & 1) == 0) return t * t % M; else return t * t % M * a % M; } public long gcd(long a, long b) { while (b != 0) { var t = a % b; a = b; b = t; } return a; } public long lcm(int a, int b) { return a * (long)b / gcd(a, b); } }*/ }