import java. util. Scanner;

public class main{
	public static void main (String[] args){
		Scanner scanner = new Scanner (System. in);
		
		//行数
		int count = scanner. nextInt();
		
		//数
		long number;
		//答え
		long answer = 0;
		for (int j = 0; j < count; j ++){
			number = scanner. nextLong();
			answer += number;
		}
		System. out. println (answer);
	}
}