#include <bits/stdc++.h>
using namespace std;
void solve() {
  long long n;
  cin >> n;
  long long a[n];
  long long sum = 0;
  long long mx = INT_MIN;
  for (long long i = 0; i < n; i++) {
    cin >> a[i];
    mx = max(mx, a[i]);
    sum += a[i];
  }
  if (sum % 2 == 0 && mx <= sum / 2) {
    cout << "YES" << '\n';
  } else {
    cout << "NO" << '\n';
  }
}
signed main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  solve();
}
