import java.util.Scanner;

public class Main {

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

        Scanner wczytanie2 = new Scanner(System.in);

        int[] tab1 = new int[5];
        int suma=0;

        for (int e = 0; e < tab1.length; e++) {
            tab1[e] = wczytanie2.nextInt();
            suma+=tab1[e];
        }

        System.out.println(suma);

    }
}