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