唉.先睡觉去...
失眠。。。
回复：（stupid_boy）我用的是VC++ .....晕死,到现在都...
To stupid_boy: my C verions is built on VS2005 (VC8).
To leeco: different online judge systems use different compliers. For PKUOJ, %I64d is accepted; for NKUOJ, %lld is accepted. (You may want to read their FAQs.)