from decimal import *
import math
h=input().split()
a,b,c=int(h[0]),int(h[1]),int(h[2])
e=Decimal(math.sqrt(a))
f=Decimal(math.sqrt(b))
g=Decimal(math.sqrt(c))
if(e+f==g):
  print('No')
elif(e+f>g):
  print('No')
else:
  print('Yes')