#include <bits/stdc++.h>
using namespace std;
int main(int argc, char* argv[]) {
  int a, b, c;
  cin >> a >> b >> c;
  int Max = max(max(a, b), c);
  int Avg = (a + b + c) / 2;
  if (Max == Avg) {
    cout << "Yes" << endl;
  } else {
    cout << "No" << endl;
  }
  return 0;
}
