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

int main() {
  long a,b,c;
  cin>>a>>b>>c;
if(a*b*4<(c-a-b)*(c-a-b)){
  cout<<"Yes"<<endl;
}
  else if (a*b*4>=(c-a-b)*(c-a-b))
    cout<<"No"<<endl;
  }
  
 //cout<<c*c;
  
}