~c...c20101.[]10f（p）g（p）g（p）=O（（logp）^）f（p）pf（p）logpC（logp）^linfpn+1-pnlnpn^2=0nnpn+1-pn=2k2.122k+pnpn1.npnlnpnliupn+npnlnpnlnpnpnn.