#include <bits/stdc++.h>
using namespace std;
const int INF = 1e9;
const int MOD = 1e9 + 7;
const long long LLINF = 1e18;
int main() {
  int a, b, c;
  cin >> a >> b >> c;
  if (a == c + b || a + b == c || b == a + c) {
    cout << "Yes¥n";
  } else {
    cout << "No¥n";
  }
  return 0;
}
