#include <bits/stdc++.h>
using namespace std;
int main() {
  int arr[4];
  cin >> arr[0];
  cin >> arr[1];
  cin >> arr[2];
  sort(arr, arr + 3);
  if (arr[0] + arr[1] == arr[2]) {
    cout << "Yes" << endl;
  } else
    cout << "NO" << endl;
  return 0;
}
