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]);
         double A = Math.Sqrt(a);
         double B = Math.Sqrt(b);
         double C = Math.Sqrt(c);
         if(a == 1){
         A = a;
         }
         if(b == 1){
         B = b;
         }
         if(c == 1){
         C = c;
         }
         
         if(A + B < C){
         Console.WriteLine("Yes");
         }else if(A + B >= C)
         {
         Console.WriteLine("No");
         }
         
       }
   }
