#include <bits/stdc++.h>
using namespace std;
int main() {
  vector<int> a(3);
  cin >> a[0] >> a[1] >> a[2];
  sort(a.begin(), a.end());
  if (a[0] + a[1]) {
    cout << "Yes" << endl;
  } else {
    cout << "No" << endl;
  }
}
