#include <iostream>
#include <fstream>
#include <algorithm>

using namespace std;

int N, A[500];
int main()
{
	ifstream fin("equation.in");
	fin >> N;
	for (int i = 0; i < N; i++)
		fin >> A[i];

	sort(A, A + N);
	int T = 0;
	for (int i = N - 1; i >= 0; i--)
	{
		if (T <= 0)
			T += A[i];
		else
			T -= A[i];
	}

	ofstream fout("equation.out");
	fout << (T ? "NO" : "YES");
}