package work;
import java.io.FileWriter;
import java.io.IOException;
import java.util.Scanner;
 
public class Work
{ public static void main(String[] args) throws IOException
  { FileWriter out = new FileWriter("output.txt");
    Scanner    in  = new Scanner(System.in);
    String[] t = in.nextLine().split(" "); 
    int sum=0;
    for (int j=0; j<t.length; j++) sum+=Integer.parseInt(t[j]);      
    out.write(sum+"\n");
    out.close();
  }
}