#include <bits/stdc++.h>
using namespace std;

int main() {
    int a;
    unsigned long int input;
    unsigned long int ans = 0;
    cin >> a;
    for (int i = 0; i < a; i++){ 
        cin >> input;
        ans += input;
    }
    cout << ans << "\n";
    return 0;
}