#include <bits/stdc++.h>
using namespace std;
int main() {
  vector<int> vec(3);
  cin >> vec.at(0) >> vec.at(1) >> vec.at(2);
  sort(vec.begin(), vec.end());
  reverse(vec.begin(), vec.begin());
  if (vec.at(0) == vec.at(1) + vec.at(2)) {
    cout << "YES" << endl;
  } else {
    cout << "NO" << endl;
  }
  return 0;
}
