import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;


public class Adunare {
  public static void main(String[] args) throws IOException {
    List<Integer> input = new ArrayList<Integer>();
	BufferedReader reader = new BufferedReader(new FileReader("adunare.in"));
    String currentLine;
    while ((currentLine = reader.readLine()) != null) {
      input.add(Integer.parseInt(currentLine));
    }
    reader.close();
    int result = 0;
    for (Integer number : input) {
      result += number;
    }
    PrintWriter writer = new PrintWriter("adunare.out");
    writer.print(result);
    writer.close();
  }
}