#include <bits/stdc++.h>
using namespace std;
using ll = long long;
const double pi = acos(-1);
template <typename T>
ostream& operator<<(ostream& os, const vector<T>& v) {
  for (ll i = (0), __last_i = (v.size()); i < __last_i; i++) {
    if (i) os << " ";
    os << v[i];
  }
  return os;
}
template <typename T>
ostream& operator<<(ostream& os, const vector<vector<T>>& v) {
  for (ll i = (0), __last_i = (v.size()); i < __last_i; i++) {
    if (i) os << endl;
    os << v[i];
  }
  return os;
}
int main() {
  int A, B, C;
  cin >> A >> B >> C;
  if (A + B == C)
    cout << "Yes" << endl;
  else if (B + C == A)
    cout << "yes" << endl;
  else if (C + A == B)
    cout << "Yes" << endl;
  else
    cout << "No" << endl;
}
