package ab;

import java.io.BufferedReader;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;

class APlusB {

	public static void main(String[] args) throws IOException {

		FileInputStream file = new FileInputStream("adunare.in");
		BufferedReader reader = new BufferedReader(new InputStreamReader(file));
		

		String line = reader.readLine();
		int total = 0;
		while (line != null) {
			total += Integer.parseInt(line);
			line = reader.readLine();
		}
//		System.out.println(total);
		file.close();
		FileOutputStream outFile = new FileOutputStream("adunare.out");
		byte[] contentInBytes = Integer.toString(total).getBytes();
		outFile.write(total);
		outFile.flush();
		outFile.close();
	}

}