#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, c, ab;
  cin >> a >> b >> c;
  ab = max(a, b);
  if (max(ab, c) == (a + b + c) / 2) {
    cout << "Yes" << endl;
  } else {
    cout << "NO" << endl;
  }
}
