#include<iostream>
#include<string>
#include<cmath>
#include<iomanip>
#include<cstdlib>
using namespace std;
int main(){
  int a,b,c;
  cin>>a>>b>>c;
  if( a + b == c || b + c == a || c + a == b )){
    cout<<"YES"<<endl;
  }
  else{
    cout<<"NO"<<endl;
  }
   return 0;
  
}
