#include <cstdint>
#include <iostream>

using namespace std;

static void setup()
{
    cin.tie(0);
    ios::sync_with_stdio(false);
}

int main(int argc, char **argv)
{
    setup();

    int n;
    cin >> n;

    uint64_t sum;
    for (auto i = 0; i < n; ++i) {
        uint64_t a;
        cin >> a;
        sum += a;
    }

    cout << sum << endl;
    return 0;
}