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