#include "bits/stdc++.h"
#define in std::cin
#define out std::cout
#define rep(i,N) for(LL i=0;i<N;++i)
typedef long long int LL;

int main()
{
	LL N;
	in >> N;
	std::vector<LL>A(N);
	rep(i, N) in >> A[i];

	LL ans = 0;
	rep(i, N) ans += A[i];

	out << ans << std::endl;
}