#include <bits/stdc++.h>
using namespace std;
int main() {
  cin.sync_with_stdio(0);
  cin.tie(0);
  cin.exceptions(cin.failbit);
  int n;
  cin >> n;
  vector<long long> a(n);
  long long s = 0;
  for (int i = 0; i < n; i++) {
    cin >> a[i];
    s += a[i];
  }
  sort(a.begin(), a.end());
  reverse(a.begin(), a.end());
  if (s % 2 == 1) {
    cout << "NO" << endl;
    return 0;
  }
  if (a[0] <= s / 2) {
    cout << "YES" << endl;
  } else {
    cout << "NO" << endl;
  }
  return 0;
}
