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