#include <bits/stdc++.h>
using namespace std;
int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  int n, m = 0, a;
  long long s = 0;
  cin >> n;
  for (int i = 0; i < n; ++i) {
    cin >> a;
    m = max(m, a);
    s += a;
  }
  if (s % 2 || m > s / 2)
    cout << "NO";
  else
    cout << "YES";
}
