#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, c;
  cin >> a >> b >> c;
  int x;
  x = max(max(a, b), c);
  if ((a + b + c) / 2 == x) {
    cout << "Yes";
  } else
    cout << "No";
  return 0;
}
