#include <bits/stdc++.h>
using namespace std;
inline bool isvowel(char ch) {
  ch = tolower(ch);
  return (ch == 'a' || ch == 'e' || ch == 'i' || ch == 'o' || ch == 'u');
}
bool isprime(int n) {
  if (n < 2 || (n % 2 == 0 && n != 2)) return false;
  for (int i = 3; i * i <= n; i += 2)
    if (n % i == 0) return false;
  return true;
}
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
  long long n, sum = 0, mx = 0;
  cin >> n;
  vector<long long> v(n);
  for (long long i = 0; i < n; i++) {
    cin >> v[i];
    sum += v[i];
    mx = max(mx, v[i]);
  }
  if (sum & 1 || sum - mx < mx) {
    cout << "NO";
    return 0;
  }
  cout << "YES";
  return 0;
}
