#include <iostream>
#include <algorithm>

using namespace std;

int a, b, c, Max

int main() {
    cin >> a >> b >> c;
    Max = max(a, max(b, c));
    if(a + b + c - Max == Max) {
        cout << "YES\n";
    }
    else {
        cout << "NO\n";
    }
    return 0;
}
