#include <bits/stdc++.h>
using namespace std;
int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);
  array<int, 3> a;
  for (int i = 0; i < 3; ++i) cin >> a[i];
  sort(a.begin(), a.end());
  cout << (a[0] + a[1] == a[2] ? "YES\n" : "NO\n");
}
