#include <bits/stdc++.h>
using namespace std;
int main() {
  int candy[3];
  for (int i = 0; i < (int)(3); i++) {
    cin >> candy[i];
  }
  if (candy[0] + candy[1] == candy[2]) {
    cout << "Yes" << endl;
  } else if (candy[0] + candy[2] == candy[1]) {
    cout << "Yes" << endl;
  } else if (candy[1] + candy[2] == candy[3]) {
    cout << "Yes" << endl;
  } else {
    cout << "No" << endl;
  }
}
