#include <bits/stdc++.h>
int main() {
  int bag[3], m = -1, total = 0;
  for (int i = 0; i < 3; ++i) {
    std::cin >> bag[i];
    m = std::max(m, bag[i]);
    total += bag[i];
  }
  std::cout << (total - m == m ? "YES" : "NO") << std::endl;
  return 0;
}
