#include <iostream>
#include <cstdio>
using namespace std;

int main() {
    int n;
    long long int sum = 0;
    long long a;
    scanf("%d", &n);
    while (n--) {
        scanf("%lld", &a);
        sum += a;
    }
    printf("%lld\n", sum);
    return 0;
}