#include <bits/stdc++.h>
using namespace std;
const int INF = 999999999;
const int MOD = (int)1e9 + 7;
const int EPS = 1e-9;
int main() {
  cin.tie(0);
  ios::sync_with_stdio(false);
  int a, b, c;
  cin >> a, b, c;
  if ((int)max(max(a, b), c) * 2 == a + b + c)
    cout << "Yes" << endl;
  else
    cout << "No" << endl;
}
