#include <iostream>
#include <algorithm>
 
using namespace std;
 
int main(){
  int a, b, c;
  cin >> a >> b >> c;
  int sum = min(a, b);
  sum += min(max(a, b), c);
  cout << (max(max(a, b), c) == sum) ? "YES" : "NO") << endl;
  return 0;
}
