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

int main() {
  vector 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;
  }
}
