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