/* Solution to HackerRank: Large Sum
 * URL: https://www.hackerrank.com/contests/projecteuler/challenges/euler013
 */
import java.io.*;
import java.util.*;
import java.math.*;

public class Solution {

    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        
        int N = in.nextInt();
        
        BigInteger sum = new BigInteger("0");
        
        for(int t=0; t<N; t++){
            sum = sum.add(new BigInteger(in.next()));
        }
        
        System.out.println(sum.toString().substring(0, 10));
    }
}