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