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