>>650
import java.util.StringTokenizer;
class BootStrap {
  public static void main(String[] args){
    StringBuffer seqBuf = new StringBuffer();
    for(int i = 0; i < args.length; i++){
      seqBuf.append(args[i] + " ");
    }
    CalcSum calcSum = new CalcSum();
    calcSum.exec(seqBuf.toString());
  }
}
class CalcSum {
  public void exec (String seq){
  OutputAnswer outputAnswer = new OutputAnswer();
  outputAnswer.setAnswer(calc(seq));
  outputAnswer.display();
  }
  private int calc (String seq){
  StringTokenizer stringTokenizer= new StringTokenizer(seq);
  int sum = 0;
  while(stringTokenizer.hasMoreTokens()){
    sum += Integer.parseInt(stringTokenizer.nextToken());
  }
  return sum;
  }
}
class OutputAnswer {
  private int answer;
  public void setAnswer(int answer){this.answer = answer;}
  public void display(){System.out.println(answer);}
}