#include <cstdio>
using ll = long long;
using namespace std;
ll a[500000];
int main() {
    int n; scanf("%d", &n);
    for (int i = 0; i < n; ++ i) scanf("%lld", &a[i]);
    ll b = 0;
    for (int i = 0; i < n; ++ i) b += a[i];
    printf("%lld\n", b);
    return 0;
}