program main
 
  implicit none
 
  integer(8) :: a, b, c, i,j,k
  
  read(*,*) a, b, c
  
  i = c**2
  j = -2*(a+b)*c
  k = (a-b)**2
  if ( i+j+k>0 .and. (c-(a+b)) > 0  ) then
    print*, "Yes"
  else
    print*, "No"
  end if
  
  
end program main
