using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;


   class Program
   {
       static void Main(string[] args)
       {
         string[] line = Console.ReadLine().Split(' ');
         long a = long.Parse(line[0]);
         long b = long.Parse(line[1]);
         long c = long.Parse(line[2]);
         if(Math.Sqrt(a) + Math.Sqrt(b) < Math.Sqrt(c))
         {
         Console.WriteLine("Yes");
         }else
         {
         Console.WriteLine("No");
         }
       }
   }
