import java.io.*;
import java.util.*;

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

    //入力
    BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
    Scanner scan=new Scanner(System.in);
    int n=Integer.parseInt(br.readLine());
    long[] a=new long[n];
    for(int i=0;i<a.length;i++){
      a[i]=Long.parseLong(scan.next());
    }

    //合計計算
    long sum=0;
    for(int i=0;i<a.length;i++){
      sum+=a[i];
    }
    System.out.println(sum);

  }
}