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