#include "bits/stdc++.h"
using namespace std;

int main() {

	vector<int> vec;
	cin >> vec.at(0) >> vec.at(1) >> vec.at(2);

	sort(vec.begin(), vec.end());

	string res = false;

	if (vec.at(0) + vec.at(1) == vec.at(2)) res = true;
	if (vec.at(0) == vec.at(1) + vec.at(2)) res = true;

	cout << res << endl;

	return 0;
}