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