#include <bits/stdc++.h>
using namespace std;
inline void FAST_IO() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
}
int main() {
  FAST_IO();
  int n;
  cin >> n;
  vector<long long> a(n);
  long long sum = 0;
  long long max = 0;
  for (int i = 0; i < n; ++i) {
    cin >> a[i];
    max = std::max(max, a[i]);
    sum += a[i];
  }
  if (sum % 2) {
    cout << "NO" << endl;
  } else {
    if (sum / 2 >= max)
      cout << "YES" << endl;
    else
      cout << "NO" << endl;
  }
  return 0;
}
