program main
  integer(8) :: a,b,c

  read(*,*) a,b,c

  if ( sqrt(real(a,16)) + sqrt(real(b,16))  <  sqrt(real(c,16)) ) then
     write(*,'(a)') 'Yes'
  else 
     write(*,'(a)') 'No'
  end if

end program main
