#include <bits/stdc++.h>
using namespace std;
const int N = 105;
const long long mod = 1e9 + 7;
int main() {
  ios::sync_with_stdio(0);
  cin.tie(0);
  cout.tie(0);
  int arr[3];
  for (__typeof(3) i = (0) - ((0) > (3)); i != (3) - ((0) > (3));
       i += 1 - 2 * ((0) > (3)))
    cin >> arr[i];
  sort(arr, arr + 3);
  if (arr[0] + arr[1] == arr[3]) {
    cout << "Yes";
    return 0;
  }
  cout << "No";
}
