#include <bits/stdc++.h>
using namespace std;
bool cmp(long long int x, long long int y) { return x > y; }
int main() {
  ios_base::sync_with_stdio(false);
  cin.tie(NULL);
  long long int n;
  cin >> n;
  long long int a[n];
  long long int sum = 0;
  for (long long int i = 0; i < n; ++i) {
    cin >> a[i];
    sum += a[i];
  }
  if (sum % 2 == 1) {
    cout << "NO";
  } else {
    sort(a, a + n);
    if (a[n - 1] <= sum - a[n - 1])
      cout << "YES";
    else
      cout << "NO";
  }
  return 0;
}
