#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)
        {
             cout<<"YES"<<endl;
        }
        else
        {
            cout<<"NO";
        }
return 0;
}