#include<bits/stdc++.h>
#define int long long
using namespace std;
int a,b,c;
signed main()
{
    ios::sync_with_stdio(0);
    cin.tie(0),cout.tie(0);
    cin>>a>>b>>c;
    if(a+b==c||a+c==b||b+c==a) cout<<"YES";
    else cout<<"NO";
    return 0;
}