#include <bits/stdc++.h>
using namespace std;
int main() {
  int a, b, c, sum1, sum2, sum3;
  cin >> a;
  cin >> b;
  cin >> c;
  sum1 = a + b;
  sum2 = b + c;
  sum3 = c + a;
  if (sum1 == c) {
    cout << "YES" << endl;
  } else if (sum2 == a) {
    cout << "YES" << endl;
  } else if (sum3 == b) {
    cout << "YES" << endl;
  } else {
    cout << "No";
  }
}
