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