source_code: import java.io.*;
  import java.math.*;
  import java.util.*;
  import java.util.stream.*;
  
  @SuppressWarnings("unchecked")
  public class P35C {
  
    final static int SHIFT = 11;
    final static int MASK = (1 << SHIFT) - 1;
    final static int [] DX = {-1, 1,  0, 0};
    final static int [] DY = { 0, 0, -1, 1};
  
    public void run() throws Exception {
      int m = nextInt();
      int n = nextInt();
  
      boolean [][] burned = new boolean [n][m];
      List<Integer> burn = new ArrayList();
      for (int k = nextInt(); k > 0; k--) {
        int x = nextInt() - 1;
        int y = nextInt() - 1;
        burned[y][x] = true;
        burn.add((x << SHIFT) | y);
      }
  
      int lastXY = 0;
      List<Integer> newBurn = null;
      do {
        lastXY = burn.get(0);
        newBurn = new ArrayList();
  
        for (int xy : burn) {
          int x = xy >> SHIFT;
          int y = xy & MASK;
  
          for (int i = 0; i < 4; i++) {
            int nx = x + DX[i];
            int ny = y + DY[i];
  
            if ((ny >= 0) && (ny < n) && (nx >= 0) && (nx < m) && (!burned[ny][nx])) {
              burned[ny][nx] = true;
              newBurn.add((nx << SHIFT) | ny);
            }
          }
        }
  
        burn = newBurn;
      } while (newBurn.size() > 0);
  
      println(((lastXY >> SHIFT) + 1) + " " + ((lastXY & MASK) + 1));
    }
  
    public static void main(String... args) throws Exception {
      br = new BufferedReader(new InputStreamReader(new FileInputStream("input.txt")));
      pw = new PrintWriter(new BufferedOutputStream(new FileOutputStream("output.txt")));
      new P35C().run();
      br.close();
      pw.close();
      System.err.println("\n[Time : " + (System.currentTimeMillis() - startTime) + " ms]");
    }
  
    static long startTime = System.currentTimeMillis();
    static BufferedReader br;
    static PrintWriter pw;
    StringTokenizer stok;
  
    String nextToken() throws IOException {
      while (stok == null || !stok.hasMoreTokens()) {
        String s = br.readLine();
        if (s == null) { return null; }
        stok = new StringTokenizer(s);
      }
      return stok.nextToken();
    }
  
    void print(byte b) { print("" + b); }
    void print(int i) { print("" + i); }
    void print(long l) { print("" + l); }
    void print(double d) { print("" + d); }
    void print(char c) { print("" + c); }
    void print(Object o) {
      if (o instanceof int[]) { print(Arrays.toString((int [])o));
      } else if (o instanceof long[]) { print(Arrays.toString((long [])o));
      } else if (o instanceof char[]) { print(Arrays.toString((char [])o));
      } else if (o instanceof byte[]) { print(Arrays.toString((byte [])o));
      } else if (o instanceof short[]) { print(Arrays.toString((short [])o));
      } else if (o instanceof boolean[]) { print(Arrays.toString((boolean [])o));
      } else if (o instanceof float[]) { print(Arrays.toString((float [])o));
      } else if (o instanceof double[]) { print(Arrays.toString((double [])o));
      } else if (o instanceof Object[]) { print(Arrays.toString((Object [])o));
      } else { print("" + o); }
    }
    void print(String s) { pw.print(s); }
    void println() { println(""); }
    void println(byte b) { println("" + b); }
    void println(int i) { println("" + i); }
    void println(long l) { println("" + l); }
    void println(double d) { println("" + d); }
    void println(char c) { println("" + c); }
    void println(Object o) { print(o); println(); }
    void println(String s) { pw.println(s); }
    int nextInt() throws IOException { return Integer.parseInt(nextToken()); }
    long nextLong() throws IOException { return Long.parseLong(nextToken()); }
    double nextDouble() throws IOException { return Double.parseDouble(nextToken()); }
    char nextChar() throws IOException { return (char) (br.read()); }
    String next() throws IOException { return nextToken(); }
    String nextLine() throws IOException { return br.readLine(); }
    int [] readInt(int size) throws IOException {
      int [] array = new int [size];
      for (int i = 0; i < size; i++) { array[i] = nextInt(); }
      return array;
    }
    long [] readLong(int size) throws IOException {
      long [] array = new long [size];
      for (int i = 0; i < size; i++) { array[i] = nextLong(); }
      return array;
    }
    double [] readDouble(int size) throws IOException {
      double [] array = new double [size];
      for (int i = 0; i < size; i++) { array[i] = nextDouble(); }
      return array;
    }
    String [] readLines(int size) throws IOException {
      String [] array = new String [size];
      for (int i = 0; i < size; i++) { array[i] = nextLine(); }
      return array;
    }
  }