#include <bits/stdc++.h>
using namespace std;
const long double PI = acos(-1);
int main() {
  ios::sync_with_stdio(false);
  cin.tie(0);
  long long n, sum = 0, a, mx = 0;
  cin >> n;
  for (int i = 0; i < n; i++) {
    cin >> a;
    sum += a;
    mx = max(mx, a);
  }
  if (sum & (long long)1)
    cout << "NO\n";
  else {
    if (mx > sum / 2)
      cout << "NO\n";
    else
      cout << "YES\n";
  }
  return 0;
}
