#include <bits/stdc++.h>
using namespace std;
inline void solve() {
  int n;
  cin >> n;
  vector<int> a(n);
  int64_t sum = 0;
  for (int i = 0; i < n; i++) {
    cin >> a[i];
    sum += a[i];
  }
  if (sum % 2) {
    cout << "NO\n";
    return;
  }
  for (int i = 0; i < n; i++) {
    if (a[i] > (sum / 2)) {
      cout << "NO\n";
      return;
    }
  }
  cout << "YES\n";
}
signed main() {
  int t = 1;
  while (t--) solve();
}
