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