#include <bits/stdc++.h>
using namespace std;
int a[100100];
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  int n;
  cin >> n;
  long long t = 0;
  long long maxx = 0;
  for (int i = 0; i < n; i++) {
    cin >> a[i];
    t += a[i];
    if (maxx < a[i]) maxx = a[i];
  }
  if (t % 2 == 1)
    cout << "NO\n";
  else {
    if (maxx > t / 2)
      cout << "NO\n";
    else
      cout << "YES\n";
  }
  return 0;
}
