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

  read(*,*) a,b,c

!  if ( sqrt(real(a,8)) + sqrt(real(b,8)) - sqrt(real(c,8)) < 0.e-10 ) then
  if ( 2.d0*sqrt(real(a,8))*sqrt(real(b,8)) < c - (a + b)) then
     write(*,'(a)') 'Yes'
  else 
     write(*,'(a)') 'No'
  end if

end program main
