#include <bits/stdc++.h>
using namespace std;
int main() {
  int A, B, C;
  cin >> A >> B >> C;
  string ans = "Yes";
  if (A + B != C) ans = "No";
  if (A + C != B) ans = "No";
  if (C + B != A) ans = "No";
  cout << ans << endl;
  return 0;
}
