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