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