#include <bits/stdc++.h>
using namespace std;
const long long mod = 1000000007;
const long long INF = 1000000009;
long long i;
int main() {
  long long a, b, h;
  if (a + b == h || b + h == a || a + h == b)
    cout << "Yes";
  else
    cout << "No";
  cout << endl;
}
