#include <bits/stdc++.h>
using namespace std;
int main() {
  ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
  int n;
  cin >> n;
  vector<int> v(n);
  for (int& i : v) cin >> i;
  long long sum = 0;
  for (int i = 0; i < n; ++i) sum += v[i];
  if (sum % 2 == 1) {
    cout << "NO";
    return 0;
  }
  sort(v.begin(), v.end());
  if (v.back() > sum - v.back()) {
    cout << "NO";
    return 0;
  }
  cout << "YES";
}
