#include <bits/stdc++.h>
using namespace std;
signed main() {
  int a, b, c, d, e;
  cin >> a >> b >> c;
  d = max(a, b);
  e = max(d, c);
  while (1) {
    if (e == a) {
      if (e == b + c) {
        cout << "YES\n";
        break;
      } else {
        cout << "NO\n";
        break;
      }
    }
    if (e == b) {
      if (e == a + c) {
        cout << "YES\n";
        break;
      } else {
        cout << "NO\n";
        break;
      }
    }
    if (e == c) {
      if (e == a + b) {
        cout << "YES\n";
        break;
      } else {
        cout << "NO\n";
        break;
      }
    }
  }
}
