#include <bits/stdc++.h>
using namespace std;
void solve() {
  long long int n;
  cin >> n;
  long long int arr[n];
  for (long long int i = 0; i < n; i++) cin >> arr[i];
  sort(arr, arr + n);
  long long int sum = 0;
  for (long long int i = 0; i < n - 1; i++) sum += arr[i];
  if (sum >= arr[n - 1] and ((sum + arr[n - 1]) % 2) == 0)
    cout << "YES\n";
  else
    cout << "NO\n";
}
int main() { solve(); }
