/**********************************************************************************/
/*  Problem: d392 "读取练习——强大的加法！" from liouzhou_101        */
/*  Language: JAVA (589 Bytes)                                                    */
/*  Result: AC(308ms, 12.1MB) judge by this@ZeroJudge                             */
/*  Author: ssc24 at 2011-09-24 15:01:45                                          */
/**********************************************************************************/


package javaapplication42;
import java.util.*;
import java.math.*;



public class JavaApplication42 {


  public static void main(String[] args) {

    Scanner sc = new Scanner(System.in);

    while (sc.hasNext()){
      String input = sc.nextLine();
      StringTokenizer st = new StringTokenizer(input);
      long sum=0;
      //long temp=0;
      while(st.hasMoreTokens()){
        //temp =
        sum += Long.parseLong(st.nextToken());
      }
      System.out.println(sum);






    }//whlle*/
  }//main
}//class