#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, c;
  cin >> a >> b >> c;
  int sum = a + b + c;
  if (sum % 2 == 1) {
    cout << "NO" << endl;
  } else if (sum / 2 == a + b || sum / 2 == b + c || sum / 2 == a + c) {
    cout << "YES" << endl;
  } else {
    cout << "NO" << endl;
  }
}
