#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, c;
  cin >> a >> b >> c;
  int pair1 = a + b;
  int pair2 = a + c;
  int pair3 = b + c;
  if ((pair1 == c) || (pair2 == b) || (pair3 == a)) {
    cout << "YES" << endl;
  } else {
    cout << "NO" << endl;
  }
  return 0;
}
