source_code: import java.io.File;
  import java.io.FileNotFoundException;
  import java.io.PrintWriter;
  import java.util.LinkedList;
  import java.util.Queue;
  import java.util.Scanner;
  
  
  public class ProblemD {
  
      static int n;
      static int m;
      static boolean[][] fire;
      
      public static void main(String[] args) throws FileNotFoundException {
          Scanner sc = new Scanner(new File("input.txt"));
          n = sc.nextInt();
          m = sc.nextInt();
          int k = sc.nextInt();
          fire = new boolean[n][m];
          Queue<Pos> q = new LinkedList<Pos>();
          for (int i = 0; i < k; i++) {
              int x = sc.nextInt();
              int y = sc.nextInt();
              q.add(new Pos(x - 1, y - 1));
              fire[x - 1][y - 1] = true;
          }
          int[] di = new int[] { 1, -1, 0, 0 };
          int[] dj = new int[] { 0, 0, 1, -1};
          Pos last = null;
          while (q.size() > 0) {
              Pos pos = q.poll();
              last = pos;
              for (int kk = 0; kk < 4; kk++) {
                  int ni = pos.i + di[kk];
                  int nj = pos.j + dj[kk];
                  if (ni >= 0 && nj >= 0 && ni < n && nj < m) {
                      if (!fire[ni][nj]) {
                          fire[ni][nj] = true;
                          q.add(new Pos(ni, nj));
                      }
                  }
              }
          }
          PrintWriter out = new PrintWriter(new File("output.txt"));
          out.println((last.i + 1) + " " + (last.j + 1));
          out.flush();
          out.close();
      }
      
  
  }
  
  class Pos {
      
      int i, j;
  
      public Pos(int i, int j) {
          super();
          this.i = i;
          this.j = j;
      }
  
      @Override
      public int hashCode() {
          final int prime = 31;
          int result = 1;
          result = prime * result + i;
          result = prime * result + j;
          return result;
      }
  
      @Override
      public boolean equals(Object obj) {
          if (this == obj)
              return true;
          if (obj == null)
              return false;
          if (getClass() != obj.getClass())
              return false;
          Pos other = (Pos) obj;
          if (i != other.i)
              return false;
          if (j != other.j)
              return false;
          return true;
      }
      
      
  };
  