#include <bits/stdc++.h>
using namespace std;
const int inf = 0x3f3f3f3f;
int main() {
  long long n;
  cin >> n;
  long long ans = 0, x, mx = 0;
  while (n--) {
    cin >> x;
    ans += x;
    mx = max(mx, x);
  }
  if (ans % 2 == 0 && (ans - mx) >= mx)
    cout << "YES";
  else
    cout << "NO";
}
