#include <bits/stdc++.h>
namespace test {
std::string to_string(char val) { return std::string(1, val); }
}  // namespace test
using namespace std;
int main(void) {
  int a, b, c;
  cin >> a >> b >> c;
  if (a + b == c || a + c == b || b + c == a) {
    cout << "YES" << endl;
  } else {
    if (a == b || b == c || a == c) {
      cout << "YES" << endl;
    } else {
      cout << "NO" << endl;
    }
  }
  return 0;
}
