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