import java.io.*;
import java.util.StringTokenizer;
public class Arvutabel1{
 public static void main(String argumendid[]) throws IOException{
  int a=0;
  int b=0;
  BufferedReader sisse=new BufferedReader(
   new FileReader("Arvutabel1.txt")
  );
  String rida=sisse.readLine();
  while(rida!=null){
   System.out.println(rida);
   StringTokenizer st=new StringTokenizer(rida, " ");
      while(st.hasMoreTokens()){
       String sona=st.nextToken();
       b=Integer.parseInt(sona);
       if(a<b){
        a=b;
       }
      }  
   rida=sisse.readLine();
  }
  System.out.println(a);
  sisse.close();
 }
}