#include <bits/stdc++.h>
using namespace std;
int main(){
vector<int> vec={a,b,c};
cin>>a>>b>>c;
  sort(vec.begin(),vec.end());
  reverse(vec.begin(),vec.begin());
  if(vec.at(0)==vec.at(1)+vec.at(2)){
cout<<"YES"<<endl;
  }
else {
cout<<"NO"<<endl;
}
  return 0;
}
