#include <iostream>
using namespace std;

int main()
{
    int a,b,c = 0;
    cin >> a >> b >> c;
    int m= 0;
    int w= 0;
    m = max({a,b,c});
    w =a + b + c
    if(w == (2*m)){
        cout << "YES" << endl;
    }
    else{
        cout << "NO" << endl;
    }
    return 0;
    
}