#include <iostream>
#include <bits/stdc++.h>
using namespace std;

void work(int a,int b,int c){
        if(a+b==c) cout<<"YES"<<endl;
        else if(a-b==c) cout<<"YES"<<endl;
        else if(b-a==c) cout<<"YES"<<endl;
        else if(a*b==c) cout<<"YES"<<endl;
        else if(double(b)/a==c) cout<<"YES"<<endl;
        else if(double(a)/b==c) cout<<"YES"<<endl;
        else cout<<"NO"<<endl;
}

int main()
{
    int a,b,c;
    while(cin>>a>>b>>c){
            work(a,b,c);
    }
    return 0;
}