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