#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, c;
  cin >> a >> b >> c;
  int z[3];
  z[0] = a;
  z[1] = b;
  z[2] = c;
  sort(z, z + 3);
  if (z[0] + z[1] == z[3])
    cout << "Yes\n";
  else
    cout << "No\n";
  return 0;
}
