#include <bits/stdc++.h>
using namespace std;
int main() {
  long long n;
  cin >> n;
  long long a[n], mx = 0, sum = 0;
  for (int i = 0; i < n; i++) cin >> a[i], sum += a[i], mx = max(mx, a[i]);
  cout << ((sum % 2 == 0 && mx <= sum / 2) ? "YES" : "NO");
}
