#include <bits/stdc++.h>
using namespace std;
int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  long long mod = (long long)(1e9 + 7);
  int n;
  cin >> n;
  long long a[n], s = 0;
  for (int i = 0; i < n; i++) {
    cin >> a[i];
    s += a[i];
  }
  if (s % 2 == 1) {
    cout << "NO";
    return 0;
  }
  for (int i = 0; i < n; i++) {
    if (a[i] > s / 2) {
      cout << "NO";
      return 0;
    }
  }
  cout << "YES";
  return 0;
}
