#include <iostream>
using namespace std;
int main()
{
	int n,m,sum;
	loop:
	while (cin >> n)
	{
		for (int i = 1;i <= n;i++)
		{
			cin >> m;
			sum += m;
		}
		cout << sum << endl;
		sum = 0;
		goto loop;
	}
	return 0;
}