#include <iostream>
using namespace std;

int main() {
    int a, b, c;
    cin >> a >> b >> c; 
    
    int total = a + b + c;
    if (total % 2 == 0) { 
        if (a + b == c) {
            cout << "Yes" << endl;
        } else {
            cout << "No" << endl;
        }
    } else { 
        cout << "Bad" << endl;
    }
    
    return 0;
}
/**************************************************************
	Problem: 1677
	User: fuhoubin
	Language: C++
	Result: Accepted
	Time:12 ms
	Memory:2072 kb
****************************************************************/