#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(nullptr);
  int n, a, maxi = -1;
  long long sum = 0;
  cin >> n;
  for (int i = 0; i < n; i++) cin >> a, sum += a, maxi = max(maxi, a);
  cout << (sum & 1 or maxi > sum - maxi ? "NO" : "YES") << '\n';
  return 0;
}
