#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  vector<int> a(n);
  long long sum = 0;
  int max = 0;
  for (int i = 0; i < n; i++) {
    int x;
    cin >> x;
    a.push_back(x);
    sum += x;
    if (x > max) max = x;
  }
  if (sum % 2 == 1) {
    cout << "NO\n";
  } else {
    if (max > sum / 2)
      cout << "NO\n";
    else
      cout << "YES\n";
  }
}
