package contest; import java.io.ByteArrayInputStream; import java.io.IOException; import java.io.InputStream; import java.io.PrintWriter; import java.util.Arrays; import java.util.InputMismatchException; public class Q932F { InputStream is; PrintWriter out; String INPUT = ""; void solve() { int m = ni(), n = ni(), Q = ni(); int[][] map = new int[2*n+3][2*m+3]; for(int i = 0;i < Q;i++){ int L = ni(); int[] b = na(L+1); for(int j = 0;j < L;j++){ int sr = b[j]/m, sc = b[j]%m; int tr = b[j+1]/m, tc = b[j+1]%m; if(sr == tr){ map[2*sr][Math.min(sc, tc)*2+1]++; map[2*sr][Math.max(sc, tc)*2+1]--; }else{ map[Math.min(sr, tr)*2+1][2*sc]++; map[Math.max(sr, tr)*2+1][2*sc]--; } } } for(int i = 0;i < 2*n;i+=2){ for(int j = 3;j < 2*m+3;j+=2){ map[i][j] += map[i][j-2]; } } for(int j = 0;j < 2*m;j+=2){ for(int i = 3;i < 2*n+3;i+=2){ map[i][j] += map[i-2][j]; } } int[] q = new int[n*m]; int p = 0; q[p++] = 0; int[] d = new int[n*m]; int I = 999999999; Arrays.fill(d, I); d[0] = 0; int[] dr = { 1, 0, -1, 0 }; int[] dc = { 0, 1, 0, -1 }; for(int z = 0;z < p;z++){ int cur = q[z]; int r = cur / m, c = cur % m; for(int k = 0;k < 4;k++){ int nr = r + dr[k], nc = c + dc[k]; if(nr >= 0 && nr < n && nc >= 0 && nc < m && map[r+nr][c+nc] > 0 && d[nr*m+nc] > d[cur] + 1){ d[nr*m+nc] = d[cur] + 1; q[p++] = nr*m+nc; } } } int ret = d[n*m-1]; if(ret >= I){ out.println("Odekakedekinai.."); }else{ out.println(ret); } } void run() throws Exception { is = INPUT.isEmpty() ? System.in : new ByteArrayInputStream(INPUT.getBytes()); out = new PrintWriter(System.out); long s = System.currentTimeMillis(); solve(); out.flush(); if(!INPUT.isEmpty())tr(System.currentTimeMillis()-s+"ms"); } public static void main(String[] args) throws Exception { new Q932F().run(); } private byte[] inbuf = new byte[1024]; private int lenbuf = 0, ptrbuf = 0; private int readByte() { if(lenbuf == -1)throw new InputMismatchException(); if(ptrbuf >= lenbuf){ ptrbuf = 0; try { lenbuf = is.read(inbuf); } catch (IOException e) { throw new InputMismatchException(); } if(lenbuf <= 0)return -1; } return inbuf[ptrbuf++]; } private boolean isSpaceChar(int c) { return !(c >= 33 && c <= 126); } private int skip() { int b; while((b = readByte()) != -1 && isSpaceChar(b)); return b; } private double nd() { return Double.parseDouble(ns()); } private char nc() { return (char)skip(); } private String ns() { int b = skip(); StringBuilder sb = new StringBuilder(); while(!(isSpaceChar(b))){ // when nextLine, (isSpaceChar(b) && b != ' ') sb.appendCodePoint(b); b = readByte(); } return sb.toString(); } private char[] ns(int n) { char[] buf = new char[n]; int b = skip(), p = 0; while(p < n && !(isSpaceChar(b))){ buf[p++] = (char)b; b = readByte(); } return n == p ? buf : Arrays.copyOf(buf, p); } private char[][] nm(int n, int m) { char[][] map = new char[n][]; for(int i = 0;i < n;i++)map[i] = ns(m); return map; } private int[] na(int n) { int[] a = new int[n]; for(int i = 0;i < n;i++)a[i] = ni(); return a; } private int ni() { int num = 0, b; boolean minus = false; while((b = readByte()) != -1 && !((b >= '0' && b <= '9') || b == '-')); if(b == '-'){ minus = true; b = readByte(); } while(true){ if(b >= '0' && b <= '9'){ num = num * 10 + (b - '0'); }else{ return minus ? -num : num; } b = readByte(); } } private long nl() { long num = 0; int b; boolean minus = false; while((b = readByte()) != -1 && !((b >= '0' && b <= '9') || b == '-')); if(b == '-'){ minus = true; b = readByte(); } while(true){ if(b >= '0' && b <= '9'){ num = num * 10 + (b - '0'); }else{ return minus ? -num : num; } b = readByte(); } } private static void tr(Object... o) { System.out.println(Arrays.deepToString(o)); } }