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