#include<iostream>
using namespace std;

int main()
{
    int a,b,c,sum1,sum2,sum3;
    cin>>a;
    cin>>b;
    cin>>c;
sum1=a+b;sum2=b+c;sum3=c+a;
         if(sum1==c)
{cout<<"YES"<<endl;
         }
         else if(sum2==a)
{cout<<"YES"<<endl;
         }
         else if (sum3==b)
         else if
{cout<<"YES"<<endl;
         }
         else
{cout<<"NO";
         }
return 0;
}