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package ab;

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.FileReader;
import java.io.FileWriter;
import java.io.IOException;

/**
 *
 * @author Albert
 */
public class Ab {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) throws IOException {
        // TODO code application logic here
        int a=0;
        BufferedWriter out = new BufferedWriter(new FileWriter("adunare.out"));
        BufferedReader br = new BufferedReader(new FileReader("adunare.in"));
    try {
        String line = br.readLine();

        while (line != null) {
            try
            {
            a+= Integer.parseInt(line);
            }catch (NumberFormatException nfe) {
                System.out.println("Input must be a number.");}
            line = br.readLine();
        }
    } finally {
        br.close();
    }
        out.write(String.valueOf(a));
        out.close();
    }
    
}