#include <bits/stdc++.h>
using namespace std;
int main() {
  int n;
  cin >> n;
  int nums[n];
  long long sum = 0;
  for (int i = n; i--;) {
    cin >> nums[i];
    sum += nums[i];
  }
  if (sum % 2 || sum - 2 * (*max_element(nums, nums + n)) < 0)
    printf("NO");
  else
    printf("YES");
}
