#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, c;
  cin >> a >> b >> c;
  int x = a + b + c;
  a = max(a, b);
  a = max(a, c);
  if ((x - a) == a)
    cout << "YES";
  else
    cout << "NO";
  system("pause");
  return 0;
}
