import java.io.BufferedReader;
import java.io.InputStreamReader;

public class Main {
    public static void main(String... args) throws Exception {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        int N = Integer.parseInt(reader.readLine());
        System.out.println(reader.lines().limit(N).mapToLong(Long::parseLong).sum());
    }
}