#include <bits/stdc++.h>
using namespace std;
const long long INF = 1e18;
const int32_t M = 1e9 + 7;
void solve() {
  long long n;
  cin >> n;
  long long arr[n];
  for (long long i = 0; i < n; i++) cin >> arr[i];
  sort(arr, arr + n);
  long long sum = 0, s = 0;
  for (long long i = 0; i < n - 1; i++) {
    sum = sum + arr[i];
  }
  s = s + sum + arr[n - 1];
  if ((s % 2 == 0 && sum >= arr[n - 1])) {
    cout << "YES" << endl;
  } else
    cout << "NO" << endl;
}
int32_t main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  cout.tie(NULL);
  long long t;
  t = 1;
  while (t--) solve();
  return 0;
}
