#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, c;
  cin >> a >> b >> c;
  vector<int> L(3);
  L = {a, b, c};
  sort(L.begin(), L.end());
  if (L.at(0) + L.at(1) == L.at(3)) {
    cout << "Yes" << endl;
  } else {
    cout << "No" << endl;
  }
}
