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