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