import java.util.Scanner;

class Sample {

public static void main(String args[]) {

Scanner scanner = new Scanner(System.in);

String input = scanner.nextLine();

int n=Integer.parseInt(input);
Long sum=0L;
for(int i =0;i<n;i++) {
String l =scanner.nextLine();
sum +=Long.parseLong(l);
}
System.out.println(sum); 
}}