#include <bits/stdc++.h>
using namespace std;
inline int setBit(int N, int pos) { return N = N | (1 << pos); }
inline int resetBit(int N, int pos) { return N = N & ~(1 << pos); }
inline bool checkBit(int N, int pos) { return (bool)(N & (1 << pos)); }
int main() {
  long long n;
  cin >> n;
  vector<long long> arr(n);
  long long sum = 0;
  for (int i = 0; i < n; i++) {
    scanf("%lld", &arr[i]);
    sum += arr[i];
  }
  if (sum % 2 == 1) {
    cout << "NO" << endl;
  } else {
    sort(arr.begin(), arr.end());
    sum = sum / 2;
    if (arr[n - 1] <= sum) {
      cout << "YES" << endl;
    } else {
      cout << "NO" << endl;
    }
  }
}
