#include <bits/stdc++.h>
using namespace std;
int mod = 1e9 + 7;
const int maxn = 2e5 + 5;
void Sieve(long long n) {
  bool prime[n + 1];
  memset(prime, true, sizeof(prime));
  for (int p = 2; p * p <= n; p++) {
    if (prime[p] == true) {
      for (int i = p * p; i <= n; i += p) prime[i] = false;
    }
  }
}
long long pw(int x, unsigned int y, int p) {
  long long res = 1;
  x = x % p;
  while (y > 0) {
    if (y & 1) res = 1ll * (res * x) % p;
    y = y >> 1;
    x = (1ll * x * x) % p;
  }
  return res;
}
int a[100005];
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  ;
  int n, cnt = 0, i;
  cin >> n;
  long long sum = 0;
  for (int i = 0; i < int(n); i++) {
    cin >> a[i];
    sum += a[i];
  }
  bool ok = true;
  if (sum % 2) ok = false;
  int k = *max_element(a, a + n);
  sum -= k;
  if (sum < k) ok = false;
  if (ok)
    cout << "YES";
  else
    cout << "NO";
  return 0;
}
