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,一本色道综合亚洲 http://www.shnenglu.com/7words/archive/2009/02/06/73092.html7words 7words Fri, 06 Feb 2009 03:08:00 GMT http://www.shnenglu.com/7words/archive/2009/02/06/73092.html http://www.shnenglu.com/7words/comments/73092.html http://www.shnenglu.com/7words/archive/2009/02/06/73092.html#Feedback 0 http://www.shnenglu.com/7words/comments/commentRss/73092.html http://www.shnenglu.com/7words/services/trackbacks/73092.html ]]>綆楁硶瀵艱涔犻 22.4 http://www.shnenglu.com/7words/archive/2009/01/31/72736.html7words 7words Sat, 31 Jan 2009 11:19:00 GMT http://www.shnenglu.com/7words/archive/2009/01/31/72736.html http://www.shnenglu.com/7words/comments/72736.html http://www.shnenglu.com/7words/archive/2009/01/31/72736.html#Feedback 0 http://www.shnenglu.com/7words/comments/commentRss/72736.html http://www.shnenglu.com/7words/services/trackbacks/72736.html 22.4-1: 涓嶅緱涓嶈鑰佸鏈夋椂鍊欎篃鎸哄彉鎬佺殑錛屾悶榪欎箞澶嶆潅涓浘...鑰冩蹇典綘鎶婂浘寮勫皬鐐瑰晩,鑰冭繖涔堝ぇ錛屽悡姝繪垜榪欑鍒氬叆闂ㄧ殑灝忚彍楦熷皬鏈嬪弸鍜嬪姙 鍐欑焊涓婁簡鐣ヤ簡錛岃愬績鐐瑰氨濂?br> 22.4-2: 寮濮嬭寰楁槸娣辨悳錛岃瘯浜嗕竴涓嬩笉琛?br>鐒跺悗鑱旀兂鍒拌繖鑺傝鐨勫氨鏄嫇鎺?..鑲畾寰楃敤鎷撴帓鍟︼紙濉腑寮忔暀鑲茬殑鎬濈淮鍟?..錛?br>涓嶈繃榪樻槸娌℃兂鍑烘潵綰挎х畻娉曪紝鍒板鎼滅瓟妗?..姹楋紝涓鎼滄悳鍒版柉鍧︾鐨勪竴綃囦綔涓氳瑙?鐗涘弶瀛︽牎鏋滅劧涓嶄竴鏍?br>鐪嬬殑緇撴灉鏄斺斿姩鎬佽鍒?.. 鐪嬫潵DP蹇偣涓婃墜浜?br> 婕旂ず鍥撅紙鏍囪涓烘暟瀛楃殑瀹屽叏鏄負鏂逛究DFS鏃跺欑殑欏哄簭錛屽亣璁懼悓22.3-2錛?br>(1)鎷撴帓錛屽嵆鍙緱綾諱技P336,鍥?2-7鎵紺虹殑浠庡乏鍒板彸鐨勪竴涓『搴忓叧緋伙紝鍗充笂鍥句笅閮ㄥ垎鐨勬牱瀛?br>(2)DP涓涓?br>璁癙[v]涓簊鍒皏鐨勮礬寰勬暟錛屽垵濮嬪寲涓? 鎶奝[p]璁句負1 P[v]=鈭?sub>(u,v)belongs to EP[u] 涔熷氨鏄絳変簬鎵鏈夋嫇鎵戝簭鍓嶉潰鐨勪笌涔嬬浉杈圭殑欏剁偣鐨凱[]涔嬪拰 澶嶆潅搴︿負錛?br>鎷撴帓錛?O(V+E) 宸﹀埌鍙蟲壂涓閬岲P錛歏 鎵浠ヤ負O(V+E) 涓嶆槑鐧界殑鍦版柟錛氱敤鍟ユ暟鎹粨鏋勮〃紺哄憿錛?br>A:閭繪帴琛?..http://www-cs-students.stanford.edu/phd/comps/2007/2007-Analysis_of_Algorithms-solutions.pdf 22.4-3:
]]>綆楁硶瀵艱涔犻 22.2 http://www.shnenglu.com/7words/archive/2009/01/31/72699.html7words 7words Sat, 31 Jan 2009 03:14:00 GMT http://www.shnenglu.com/7words/archive/2009/01/31/72699.html http://www.shnenglu.com/7words/comments/72699.html http://www.shnenglu.com/7words/archive/2009/01/31/72699.html#Feedback 0 http://www.shnenglu.com/7words/comments/commentRss/72699.html http://www.shnenglu.com/7words/services/trackbacks/72699.html 1.ignore 2.ignore 3.O(V2 )
4.璇佹槑: 鑰冭檻涓涓《鐐箄,u灞炰簬V 瀵笲FS綆楁硶錛屽綋鎵ц鍒皍鍑洪槦鏃訛紝鏈?br> for each v belongs to Adj[u]
do if color[v] <- GRAY d[v]<- d[u]+1 n[v]<- u ENQUEUE(Q,v)錛堝弬鑰冪畻瀵糚325錛?br>鐢辨錛屽鐐箄鐨勯偦鎺ラ摼涓殑浠繪剰鐐箆錛屽鏋渧涓虹櫧錛屽垯d[v]=d[u]+1銆傚u鐨勯偦鎺ラ摼涓換鎰忎竴鐐瑰潎涓哄姝わ紝鎵浠ュ彲鐭ュv,v灞炰簬u鐨勯偦鎺ョ偣,d[v]=d[u]+1錛屽嵆d[v]鐨勫間笌欏哄簭鏃犲叧 鐢佃剳鐢誨浘澶夯鐑︼紝涓嶇敾浜嗭紝澶ф璇翠笅 瀵?2-3鍥綽 S鐨勪袱涓偦鎺ョ偣錛宺&&w,鑻鍦╯閭繪帴琛ㄧ殑鍓嶉潰錛寃鍦ㄥ悗闈紝鍒欏繀鐒秗涓簊鐨勫乏鍎垮瓙錛寃涓哄彸鍎垮瓙銆傚弽涔嬪垯鍙?br> 5.don't understand 6. 浜屽垎鍥?..鍏堣煩榪?sub> DDD 7.娌℃兂鍑烘潵澶嶆潅搴﹀悎閫傜殑綆楁硶錛岀湅浜嗗埆浜烘濊礬... 鑰冭檻BFS鍑哄箍搴︿紭鍏堟爲錛岀劧鍚嶥P姹傛渶澶у? if(x==leaf) D(x)=0; else D(x)=max{ maxi D(x.childi )),maxij {(d(x).childi) + d(x).childj)} + 2} 8.
]]> 綆楁硶瀵艱涔犻 22.3 http://www.shnenglu.com/7words/archive/2009/01/31/72718.html7words 7words Sat, 31 Jan 2009 03:13:00 GMT http://www.shnenglu.com/7words/archive/2009/01/31/72718.html http://www.shnenglu.com/7words/comments/72718.html http://www.shnenglu.com/7words/archive/2009/01/31/72718.html#Feedback 0 http://www.shnenglu.com/7words/comments/commentRss/72718.html http://www.shnenglu.com/7words/services/trackbacks/72718.html 2. 娌℃壂鎻忎華...鐢ㄦ墜鐢諱笉濡傛潃浜嗘垜寰椾簡... 鐢ㄦ枃瀛楀ぇ姒傝鏄庡惂 鎸塂FS瀹氫箟錛岄『搴忔槸 q 4 8 10 9 3 6 7 2 5 鏁板瓧鍚箟鏄寜鍥句笂瀛楁瘝欏哄簭緙栧彿錛屾瘮濡俼搴旇緙栦負1鍙?t搴旇緙栦負4鍙?br> 鐒跺悗瀵硅竟鏉ヨ q->w涓烘鍚戣竟(娉細浠ヤ笅F琛ㄦ鍚戣竟錛孊琛ㄥ弽鍚戣竟錛孋琛ㄤ氦鍙夎竟錛孴琛ㄦ爲杈癸級 w->s,y->q,z->x涓築 r->y,u->y涓篊 鍏跺畠涓篢 3.姣旇緝綆鍗?br>(u(v(y(xx)y)v)u)(w(zz)w) 4.璇佹槑錛?br>錛?錛夌敱瀹氱悊22.8 u鏄痸鐨勭鍏堬紝鎵浠[u]<d[v]<f[v]<f[u]鎴愮珛鏃?(u,v)蹇呯劧涓烘爲杈規垨鑰呭墠鍚戣竟 鍙嶄箣錛岃嫢(u,v)鏄爲杈規垨鍓嶅悜杈癸紝鍒?br>d[u]<d[v]<f[v]<f[u]鏄劇劧鎴愮珛錛堜笉娓呮鐨勮瘽鐢葷敾P333鐨勫浘b錛?br>錛?錛夋病絳夊彿鐨勬儏鍐佃窡涓婇綾諱技錛屾湁絳夊彿鐨勬儏鍐墊病鎯抽?.. 錛?錛?br>鍥犱負d[v]<f[v]<d[u]<f[u] 鐢辨鐢誨嚭鎷彿鍥撅紝鏄劇劧涓轟氦鍙夎竟...錛堝ソ鍍忔湁鐐瑰媺寮?..) OR 鐢眃[v]<f[v]<d[u]<f[u]涓嶆弧瓚籌紙1錛夛紙2錛変腑鏉′歡錛屾墍浠ヤ笉鑳戒負鍙嶅悜錛屾爲杈規垨鍓嶅悜杈癸紝鐢辨搴斾負浜ゅ弶杈?..錛堝ソ鍍忔洿鍕夊己...姹傝揪浜猴級 5. 6.浠g爜棰楶ASS鎺?br> 7. 閮侀椃浜嗘垜錛屽啓涓鍗妋axthon鎸傛帀...閮侀椃 浠巚鎼?鍐嶆悳P 8.娌℃兂鍑烘潵 9.P334欏墊湁璁?br>if color[v]==WHITE then (u,v)= T if color[v]==GRAY then (u,v)=B if color[v]==BLACK then (u,v)=C 10. 鍗充嬌鏈夊叆杈逛篃鏈夊嚭杈癸紝褰搖琚帰鏌ヤ互鍚庡凡緇忚鏍囦負GRAY||BLACK,涓嶄細緇х畫鍔犲叆鍙︿竴媯墊爲 11.鎴戝疄鍦ㄥ啓涓嶅嚭鏉ユ暟瀛︾殑涓ユ牸璇佹槑...褰撻潰璁插簲璇ヨ兘璁叉竻妤?..鍞夛紝鏁板宸簡瀹蟲浜哄晩 12.鐪嬭鏄熷彿鐩存帴璺寵繃錛岃繃孌墊椂闂存潵鐪?
]]>綆楁硶瀵艱涔犻 22.1-6 universal sink http://www.shnenglu.com/7words/archive/2009/01/30/72691.html7words 7words Thu, 29 Jan 2009 16:29:00 GMT http://www.shnenglu.com/7words/archive/2009/01/30/72691.html http://www.shnenglu.com/7words/comments/72691.html http://www.shnenglu.com/7words/archive/2009/01/30/72691.html#Feedback 0 http://www.shnenglu.com/7words/comments/commentRss/72691.html http://www.shnenglu.com/7words/services/trackbacks/72691.html 2)鐨勶紝浣嗘湁涓浜涗緥澶?br>璇佹槑錛氬湪緇欏畾涓鏈夊悜鍥炬湁鍚戝浘G鐨勯偦鎺ョ煩闃靛悗錛屽彲浠ュ湪O(V)鐨勬椂闂村唴紜畾G涓槸鍚﹀惈涓涓?#8220;閫氱敤鐨勬眹(universal sink),鍗沖叆搴︿負|V|-1錛屽嚭搴︿負0鐨勯《鐐廣?br> 鎰熻榪欓鎸烘湁鎰忔濓紝鑷繁鎯充簡鍗婂ぉ錛屽ぇ姒傛兂鍑轟簡鏂規硶錛屼笉榪囨湁鐐規鐤戞紜э紝鎵浠OOGLE浜嗕竴涓?br> 鍚庢潵鍙戠幇榪欒繕鏄痀AHOO浜岄潰鐨勪竴涓...錛圥.S.緹庡浗闆呰檸錛?br> 鍥句笂鐢葷敾灝變細鍙戠幇錛岃繖鏍風殑鍥鵑兘寰堟湁鍨?... eg. G: 1 2 3 4 10 1 2 0 1 30 0 0 0 4 1 0 瀵硅綰塊兘鏄?錛岃屾槸sink鐨勭偣錛屾í鐫绔栫潃鍒氬ソ緇勬垚涓崄瀛椼?br> while(j<n) { if(G[i,j]=0) j++; else i++; } return i; 鎵浠ュ彧闇瑕佹壘鍒板崄瀛楁槸鍦ㄥ摢涓偣灝辨垚浜嗐傝繖涔堟壂涓閬嶅鏉傚害涓篛(V)銆備絾鏈夌偣灝忛棶棰橈紝濡傛灉涓嶆槸鐨勮瘽錛屽彲鑳借繑鍥炲叾瀹冨?br> eg. G: 1 2 3 4 1 0 0 1 0 2 1 0 0 0 3 1 1 0 1 4 1 0 1 0 榪欎釜鐨勮瘽灝變細榪斿洖2錛屾樉鐒?涓嶆槸universal sink 鎵浠ラ渶瑕佸緱鍒扮瓟妗堝悗鍐嶉獙璇佷竴涓嬭繖涓偣錛屾í鎵珫鎵紝鍚屾牱錛屽鏉傚害涔熸帶鍒跺湪O(V) 欏轟究錛岃禐涓涓嬪浗澶栬鍧涚殑璁ㄨ姘涘洿銆?br>http://www.ocf.berkeley.edu/~wwu/cgi-bin/yabb/YaBB.cgi?board=riddles_cs;action=display;num=1195383906 鍙﹁創涓涓綉涓婃壘鐨勬湰棰樼殑瑙f硶http://www.csie.ntu.edu.tw/~r95122/alg07spr/alg07spr_hw1sol.pdf
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