#include <bits/stdc++.h>
using ll = long long;
using ld = long double;
using namespace std;
signed main() {
  cout << fixed << setprecision(20);
  ios::sync_with_stdio(false);
  cin.tie(0);
  int a, b, c;
  cin >> a >> b >> c;
  if (a + c == b || b + c == a)
    cout << "Yes\n";
  else
    cout << "No\n";
  return (0);
}
