#include <bits/stdc++.h>
using namespace std;
int main() {
  int a[3];
  cin >> a[0] >> a[1] >> a[2];
  sort(a, a + 3, greater<int>());
  if (a[0] == a[1] + a[2]) {
    cout << "YES" << endl;
  } else
    cout << "NO" << endl;
}
