#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pll = pair<ll, ll>;
using pii = pair<int, int>;
int main() {
  ios_base ::sync_with_stdio(0), cin.tie(0), cout.tie(0);
  int n, mx = -1;
  cin >> n;
  ll sum = 0;
  while (n--) {
    int x;
    cin >> x;
    mx = max(mx, x);
    sum += x;
  }
  if (sum & 1 || mx * 2 > sum)
    cout << "NO";
  else
    cout << "YES";
}
