#include <iostream>
#include <vector>

using namespace std;

int main()
{
    int n;
    cin >> n;
    int sum = 0;
    int count=0;
    vector<int> b(50);
    for (int i = 0; i < n; i++)
    {
        cin >> b[i];
        count++;
    }
    for (int i = count; i>=0; i--)
    {
        sum += b[i];
    }
    cout << sum << endl;
    return 0;
}