#include <bits/stdc++.h>
using namespace std;
const int INF = 1000000001;
const int N = 500000;
int cnt[N][5];
long long a[N];
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(0);
  cout.tie(0);
  int n;
  cin >> n;
  int ch = 0;
  long long Max = 0;
  long long sum = 0;
  for (int i = 0; i < n; ++i) {
    cin >> a[i];
    sum += a[i];
    Max = max(a[i], Max);
  }
  if (sum - Max >= Max && sum % 2 == 0) {
    cout << "YES";
  } else {
    cout << "NO";
  }
}
