#include <iostream>
#define repeat(i,n) for(int i = 0; (i) < (n); ++ (i))
using namespace std;
typedef unsigned long long ll;

int main() {
    int n;
    cin >> n;

    ll a;
    ll sum = 0;
    repeat(i,n) {
        cin >> a;
        sum += a;
    }

    cout << sum << endl;

    return 0;
}