#include <iostream>
#include <stdio.h>
#include <string>
using namespace std;

int main(int argc, char const* argv[])
{
    long long n,a;
    cin>>n;
    a=0;
    long b=0;
    for (int i = 0; i < n; i++) {
        cin>>a;
        b=a+b;
    }
    cout<<b<<endl;
    return 0;
}