#include <iostream>
using namespace std;
/* run this program using the console pauser or add your own getch, system("pause") or input loop */

long long n,sum,a[500000];

int main(void) {
	
	cin>>n;
	
	for(int i=0; i<n; i++)
	{
		cin>>a[i];
		sum += a[i];
	}
	
	cout<<sum<<endl;
	return 0;
}