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娉細鏈枃浣滀簬2009騫?鏈?鏃?0鐐規暣


sdfond 2010-02-06 18:07 鍙戣〃璇勮
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SPOJ 2154 Kruskalhttp://m.shnenglu.com/sdfond/archive/2010/02/06/107365.htmlsdfondsdfondSat, 06 Feb 2010 01:04:00 GMThttp://m.shnenglu.com/sdfond/archive/2010/02/06/107365.htmlhttp://m.shnenglu.com/sdfond/comments/107365.htmlhttp://m.shnenglu.com/sdfond/archive/2010/02/06/107365.html#Feedback0http://m.shnenglu.com/sdfond/comments/commentRss/107365.htmlhttp://m.shnenglu.com/sdfond/services/trackbacks/107365.html銆銆鐚村瓙鍜孠ruskal鐜╀竴涓彇鐭沖瓙娓告垙錛岀粰瀹歯鍫嗙煶瀛愶紝n涓嶅ぇ浜?00錛屾瘡鍫嗙煶瀛愮殑涓暟澶т簬2灝忎簬2 ^ 32錛屽弻鏂硅疆嫻佸彇瀛愶紝姣忔鍙互浠庝竴鍫嗕腑鍙栨渶澶歬涓紝褰撲竴鏂瑰彇瀹岀煶瀛愬悗鏌愬爢鐭沖瓙鐨勪釜鏁版槸绱犳暟鐨勮瘽閭d箞褰撳墠鐜╁鑾瘋儨銆傞棶鐚村瓙鏄惁鏈夊繀鑳滅瓥鐣ャ?br>
銆愰鐩垎鏋愩?br>銆銆榪欐槸涓閬揃T棰橈紝涓棿璁劇疆浜嗚澶歵rick銆傚紑濮嬪棰樻剰娌℃湁瀹屽叏鐞嗚В錛岄敊浜嗗緢澶氭錛屽悗鏉ユ壘鏉ヤ簡鏁版嵁錛屾墠鍙戠幇浜嗛棶棰樸?br>銆銆棰樼洰涓弿榪扮殑鑾瘋儨絳栫暐鏄細"A player wins if after his move the size of some heap is a prime number."榪欏彞璇濅箥涓鐪嬩互涓烘槸鍙栧畬鐭沖瓙鍚庡墿涓嬬殑鐭沖瓙涓暟鏄礌鏁扮殑鏃跺欏氨鑾瘋儨錛屽叾瀹炶繕闅愯棌鐫鍙︿竴縐嶅彲鑳斤細濡傛灉澶氬爢鐭沖瓙涓暟鏄礌鏁幫紝褰撳墠鐜╁鏃犺鎬庢牱鍙栭兘鑳借幏鑳滐紝鍥犱負鍦ㄤ粬鍙栧畬涔嬪悗錛屽叾浠栧爢鐨勭煶瀛愪釜鏁版槸绱犳暟錛屼篃婊¤凍鑾瘋儨鏉′歡銆?br>銆銆鎺ヤ笅鏉ヨ冭檻涓鑸儏鍐點傝繖涓鐩槸闄愬埗涓棿鐘舵佺殑Nim娓告垙錛屼篃灝辨槸璇達紝瀵逛簬涓鍫嗕釜鏁頒負n鐨勭煶瀛愯岃█錛屽畠鐨凷G鍊煎彇鍐充簬灝忎簬n鐨勬渶澶х礌鏁般傛敞鎰忚繖閲岄璁懼張鏈変簡涓涓皬trick錛岄鐩鏄庝簡闇瑕佸彇1鍒発涓紝濡傛灉褰撳墠鐭沖瓙涓暟鏈韓鏄礌鏁幫紝褰撶劧鏄病鐢ㄧ殑錛屽洜姝ゆ槸灝忎簬n鐨勬渶澶х礌鏁般傝灝忎簬n鐨勬渶澶х礌鏁版槸p(棰樼洰涓鏄庝簡鐭沖瓙涓暟澶т簬2錛屽洜姝涓瀹氬瓨鍦?錛岄偅涔堝彲浠ュ湪k姝ヤ互鍐呭埌杈緋鐨勪竴瀹氭槸蹇呰儨鎬侊紝鑰屼笖鏄洿鎺ヨ幏鑳滐紝闇瑕佸湪杈撳叆鐨勬椂鍊欑壒鍒?榪欎竴鐐歸渶瑕佹敞鎰忥紝鍦ㄨВ鍐抽檺鍒朵腑闂寸姸鎬佺殑Nim娓告垙鏃朵竴鑸兘闇瑕佺壒鍒?銆傜劧鍚庡氨鏄痯 + k + 1榪欎釜鐘舵侊紝鍥犱負瀹冨彲杈劇殑鐘舵佸叏鏄繀鑳滄侊紝鍥犳瀹冩槸蹇呰觸鎬侊紝SG鍊間負0銆傜幇鍦ㄨ冭檻澶т簬p + k + 1鐨勭姸鎬侊紝闂鍑烘潵浜嗐備互p + k + 2榪欎釜鐘舵佷負渚嬶紝鍥犱負瀹冨彲浠ュ埌杈緋 + 2 ... p + k + 1榪欎簺鐘舵侊紝鍥犱負p + 2 ... p + k閮芥槸鐩存帴鑾瘋儨鐘舵侊紝濡備綍鍒ゅ畾浠栦滑鐨凷G鍊煎憿錛熷鏋滃亣璁懼畠浠殑SG鍊兼槸1錛岄偅涔坧 + k + 2榪欎釜鐘舵佺殑SG鍊煎簲璇ユ槸2銆備絾鏄濊冧竴涓婼G鍊肩殑瀹氫箟錛屽畠鏄畾涔夊湪涓涓狣AG涓婄殑錛屾墍鏈夌殑鐘舵佹渶鍚庨兘鏄彲浠ュ湪鏈夐檺姝ュ唴杞Щ鍒扮粓姝㈡?蹇呰觸鎬?銆備絾鏄痯 + 1 ... p + k榪欎簺鐘舵侀兘杞Щ鍒頒簡p榪欎釜鐘舵佷笂錛屾垜浠偗瀹氫笉鑳借瀹歱鐘舵佹槸緇堟鎬侊紝鍥犳浠呬粎鍑焢 + 1 ... p + k榪欎簺鐘舵佹槸蹇呰儨鎬佸氨綆鍗曠殑鎶婂畠浠殑SG鍊艱涓?鏄笉鎭板綋鐨勶紱榪欎簺闄愬埗鐘舵佸拰浠ュ墠鐨勯鐩繕涓嶅悓錛岃繖浜涢檺鍒剁姸鎬侀兘涓嶈兘杞Щ鍒扮粓姝㈡佷笂錛屼絾鏄敱浜庨鐩殑瑕佹眰錛屽畠浠張閮芥槸蹇呰儨鎬侊紝鍥犳鎶婂畠浠殑SG鍊艱涓烘棤絀峰ぇ鏇村悎閫備簺銆?br>銆銆浠旂粏鎬濊冧竴涓嬪甫闄愬埗鐘舵佺殑SG娓告垙錛屽彲浠ュ彂鐜幫紝瀹冧滑鍜屼竴鑸殑SG娓告垙鐨勫尯鍒湪浜庯紝鍦ㄥ垎鏋愪竴鑸殑SG娓告垙鐨勬椂鍊欙紝瀵逛簬涓涓姸鎬佸浘鑰岃█錛岃漿縐誨埌緇堟鎬佺殑鏃跺欏茍涓嶆剰鍛崇潃娓告垙緇撴潫錛屽洜涓虹帺瀹跺彲浠ラ氳繃璧板叾浠栫殑鐘舵佸浘鏉ヤ繚璇佹槸鍚﹁揪鍒板繀鑳滄侊紱浣嗘槸甯﹂檺鍒剁姸鎬佺殑SG娓告垙錛岄檺鍒剁殑鐘舵佸弻鏂歸兘鏄笉鏁㈣蛋鐨勶紝鍥犱負涓鏃︿竴鏂硅蛋鍏ラ檺鍒剁姸鎬侊紝鍙︿竴鏂圭珛鍒昏幏鑳滐紝娓告垙灝辯粓姝簡銆傚彲浠ヨ涓猴紝鍙璧板叆闄愬埗鎬佸氨鐩稿綋浜庤杈擄紝瀵逛簬鍙屾柟鐜╁鑰岃█鑲畾閮戒笉浼氳繖鏍峰仛錛屽洜姝よ繖浜涢檺鍒剁姸鎬佸氨鎴愪簡“姝葷姸鎬?#8221;錛屽畬鍏ㄥ彲浠ュ拷瑙嗚繖浜涚姸鎬侊紙涔熷氨鏄涓嶅瓨鍦ㄥ埌榪欎簺鐘舵佺殑杞Щ錛夈傞氳繃涓婅堪鍒嗘瀽錛屾垜浠彲浠ヨ瀹歱 + k + 2榪欎釜鐘舵佺殑SG鍊煎簲璇ユ槸1鑰屼笉鏄?銆?br>銆銆鐜板湪榪欎釜闂鐨勫仛娉曞氨姣旇緝鏄庢湕浜嗭紝瀵逛簬姣忓爢鐭沖瓙錛屽幓鎺夐檺鍒舵佺殑璁ㄨ鍚庯紝灝卞彉鎴愪簡鍦ㄩ泦鍚坽1...k}涓夋嫨鍏冪礌鐨勪竴涓猄ubtraction Game錛屽畠鐨凷G鍊兼槸妯?k + 1)寰幆鐨勩?br>銆銆鐒跺悗灝辨槸姹傛渶榪戠礌鏁扮殑闂浜嗭紝榪欎釜娌℃湁濂藉姙娉曪紝鍙兘鏆村姏鏋氫婦銆傚浜庝竴涓暟n錛屽湪sqrt(n)鍒皀涔嬮棿瀛樺湪绱犳暟錛堟劅瑙夊簲璇ユ槸錛屼絾鏄笉浼氳瘉錛夛紝鍥犳鏈澶氭灇涓緎qrt(n)嬈″氨鑳芥壘鍒拌В銆備絾鏄瘡嬈℃灇涓懼垽绱犵殑澶嶆潅搴﹁繕鏄痵qrt(n)錛屾誨鏉傚害榪樻槸姣旇緝楂橈紝鎴戝湪鏈湴璺戞暟鎹窇浜?縐掞紝浜や笂鍘昏秴鏃朵簡錛圫POJ鐨勬椂闄?0縐掞紝榪欏眳鐒朵篃瓚呮椂錛屾暟鎹鍙樻侊級銆傛兂浜嗗緢涔呬篃娌℃湁浠涔堟柊鐨勭畻娉曪紝鏃犲鍙兘鍦ㄥ垽绱犱笂涓嬬偣鍔熷か錛岀洿鎺ユ妸Miller-Rabin鎼炲嚭鏉ヤ簡錛岄熷害鎻愰珮鍒頒簡2縐掞紝浠嶇劧瓚呮椂銆傚悗鏉ュ張鍔犱簡涓浜涘父鏁頒笂鐨勪紭鍖栵紝緇堜簬榪囦簡銆?br>
銆愭葷粨銆?br>銆銆榪欎釜棰樼洰鍋氫簡寰堥暱鏃墮棿錛屼竴鏂歸潰鏄棰樹笉娓咃紝閿欎簡鍑犳錛涘彟涓鏂歸潰鏄浜嶴G鐨勭悊璁虹悊瑙g殑涓嶅閫忓交錛屾兂浜嗗緢涔呯粓浜庢兂鏄庣櫧浜嗭紱鍐嶆湁灝辨槸浼樺寲綆楁硶涔熻姳浜嗗緢闀挎椂闂淬備笉榪囬氳繃榪欎釜棰樼洰瀵逛簬SG鐞嗚鐨勭悊瑙e張榪涗簡涓姝ワ紝鎰熻涓嶉敊錛屽懙鍛點?

娉細鏈枃浣滀簬2009騫?鏈?鏃?9鐐?7鍒?br>


sdfond 2010-02-06 09:04 鍙戣〃璇勮
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緇勫悎娓告垙鎬葷粨鈥斺斿熀鏈崥寮堥棶棰?/title><link>http://m.shnenglu.com/sdfond/archive/2010/02/06/107364.html</link><dc:creator>sdfond</dc:creator><author>sdfond</author><pubDate>Sat, 06 Feb 2010 00:55:00 GMT</pubDate><guid>http://m.shnenglu.com/sdfond/archive/2010/02/06/107364.html</guid><wfw:comment>http://m.shnenglu.com/sdfond/comments/107364.html</wfw:comment><comments>http://m.shnenglu.com/sdfond/archive/2010/02/06/107364.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://m.shnenglu.com/sdfond/comments/commentRss/107364.html</wfw:commentRss><trackback:ping>http://m.shnenglu.com/sdfond/services/trackbacks/107364.html</trackback:ping><description><![CDATA[<p>銆愭榪般?br>銆銆鏈榪戠殑鍑犳姣旇禌錛屽崥寮堢殑棰樼洰涓鐩翠笉灝戯紝鑰屼笖鍗氬紙闂鏄竴鍧楁瘮杈冨鏉傘佸簽澶х殑鍐呭錛屽洜姝ゅ湪榪欓噷灝忕粨涓涓嬶紝甯屾湜鑳藉甯嚜宸辯悊娓呬竴浜涙濊礬錛屼簤鍙栦篃澶氭潵鍑犱釜緋誨垪錛屽懙鍛點?/p> 绔炶禌涓嚭鐜扮殑緇勫悎娓告垙闂涓鑸兘婊¤凍浠ヤ笅鐗瑰緛錛?br>銆銆銆銆1. 浜屼漢鍗氬紙娓告垙錛屾瘡涓漢閮介噰鐢ㄥ鑷繁鏈鏈夊埄鐨勭瓥鐣ワ紝騫朵笖鏄袱涓漢杞祦鍋氬嚭鍐崇瓥<br>銆銆銆銆2. 鍦ㄦ父鎴忎腑鐨勪換鎰忔椂鍒伙紝姣忎釜鐜╁鍙夋嫨鐨勭姸鎬佹槸鍥哄畾鐨勶紝娌℃湁闅忔満鎴愬垎<br>銆銆銆銆3. 娓告垙鍦ㄦ湁闄愭鏁板唴緇撴潫錛屾病鏈夊鉤灞鍑虹幇<br>銆銆澶ч儴鍒嗙殑棰樼洰閮芥弧瓚充笂榪版潯浠訛紝鍥犳榪欓噷鍙璁哄湪涓婅堪鏉′歡鑼冪暣鍐呯殑鍗氬紙闂銆傝繖綾誨崥寮堥棶棰橈紝閫氬父榪樻湁鑻ュ共鍒嗙被銆備竴縐嶆槸瑙勫畾縐誨姩鏈鍚庝竴姝ョ殑娓告垙鑰呰幏鑳滐紝榪欑瑙勫垯鍙仛<span style="color: red;">Normal Play Rule</span>錛涘彟涓縐嶆槸瑙勫畾縐誨姩鏈鍚庝竴姝ョ殑娓告垙鑰呰緭錛岃繖縐嶈鍒欏彨鍋?span style="color: red;">Misere Play Rule</span>錛屼篃縐頒負Anti-SG娓告垙銆傛澶栵紝瀵逛簬娓告垙鐨勫弻鏂癸紝濡傛灉浜岃呭崥寮堢殑瑙勫垯鐩稿悓錛岄偅涔堢О涓鴻繖綾繪父鎴忔槸<span style="color: red;">瀵圭瓑</span>(impartial games)鐨勶紱鍚﹀垯縐頒負<span style="color: red;">涓嶅鉤絳夋父鎴?/span>(partizan games )銆傚綋鍒漌HU鐨勯偅鍦烘瘮璧涘氨鏄敱浜庡浜庤繖涓蹇典笉鏄緢娓呮櫚錛屽鑷寸湅瀹岄鐩箣鍚庡氨鐢⊿G瀹氱悊鏉ュ仛錛屾氮璐逛簡寰堝鏈烘椂銆傚疄闄呬笂錛岃В鍐充笉騫崇瓑鍗氬紙闂鐨勬柟娉曞拰鏅氱殑鍗氬紙闂錛圫G娓告垙錛夋槸鏈夊尯鍒殑錛屼竴鑸細閲囩敤鍔ㄦ佽鍒掓垨鑰卻urreal number銆?br><br>銆愬崥寮堝熀紜鐭ヨ瘑銆?br>銆銆鍦⊿G娓告垙涓紝鏈涓轟漢鐔熺煡鐨勬槸蹇呰儨蹇呰觸鎬侊紝涔熷彨NP鎬佺悊璁恒傛敞鎰忕殑鏄紝P鎬佸搴旂殑鏄厛鎵嬪繀璐ユ侊紝N鎬佸搴旂殑鏄厛鎵嬪繀鑳滄併傚繀鑳滃繀璐ユ佺悊璁烘槸錛?br>銆銆1. All terminal positions are P-positions<br>銆銆2. From every N-position, there is at least one move to a P-position<br>銆銆3. From every P-position, every move is to an N-position<br>銆銆鑻辨枃鐨勮〃榪伴潪甯哥畝媧佹竻鏅幫紝鑰屼笖榪欎釜鐞嗚涔熷緢濂界悊瑙o紝濡傛灉鍦ㄥ綋鍓嶇姸鎬佺殑涓嬩竴姝ュ彲浠ヨ蛋鍒板繀璐ユ侊紝閭d箞褰撳墠鐜╁灝卞彲浠ヨ蛋鍒伴偅涓姸鎬侊紝鎶婂繀璐ユ佹帹緇欏彟涓鏂癸紱濡傛灉鎵鏈夊彲杈劇姸鎬侀兘鏄繀鑳滄侊紝閭d箞褰撳墠鐜╁鏃犺濡備綍璧幫紝閮戒細鎶婂繀鑳滄佽緇欏鏂廣傛牴鎹繀鑳滃繀璐ユ佺悊璁猴紝鎴戜滑鍙互閫掑綊鐨勬眰鍑烘瘡涓姸鎬佹槸N鎬佽繕鏄疨鎬併傚繀鑳滃繀璐ユ佺悊璁哄叾瀹炲凡緇忔妸鍗氬紙闂杞寲鎴愪簡涓涓湁鍚戝浘錛屽熷姪鍥捐繖涓ā鍨嬫潵鍒嗘瀽闂錛屼嬌寰楅棶棰樺彉寰楀艦璞′簡璁稿銆傞渶瑕佹敞鎰忕殑鏄紝榪欑SG娓告垙瀵瑰簲鐨勬湁鍚戝浘鏄棤鐜殑錛屽洜涓哄鏋滄湁鐜紝閭d箞娓告垙鍙屾柟灝卞彲鑳藉湪鐜笂涓嶅仠鐨勮漿鎹㈢姸鎬侊紝娓告垙涓嶈兘鍦ㄦ湁闄愭緇堟錛岃繖鏍峰氨涓嶆弧瓚崇粍鍚堟父鎴忕殑鐗瑰緛3浜嗐?br>銆銆鐒惰屽湪寰堝鏃跺欎粎浠呯煡閬撴煇涓姸鎬佹槸蹇呰儨榪樻槸蹇呰觸鏄笉澶熺殑錛屽洜涓哄鏋滃瓨鍦ㄥ涓粍鍚堟父鎴忥紙姣斿緇忓吀鐨凬im錛夛紝瀵瑰簲鐨勭姸鎬侀泦鍚堥潪甯稿ぇ錛屾棤娉曠洿鎺ュ埄鐢ㄥ繀鑳滃繀璐ユ佺悊璁烘眰瑙o紝鍥犳闇瑕佺敤鍒板崥寮堣涓竴涓緢閲嶈鐨勫伐鍏鳳細SG鍑芥暟銆?br>銆銆鏌愪釜鐘舵佺殑SG鍑芥暟鍊煎畾涔変負褰撳墠鐘舵佹墍鏈変笉鍙揪鐨勭姸鎬佺紪鍙蜂腑鏈灝忕殑緙栧彿錛屽叾涓粓姝㈡佺殑SG鍑芥暟鍊兼槸0銆傛湁浜嗚繖涓伐鍏鳳紝灝卞紩鍏ヤ竴涓潪甯稿己澶х殑瀹氱悊鈥斺擲G鍒嗚В瀹氱悊錛?br><br>銆銆<span style="background-color: #ffffff; color: red;">澶氫釜緇勫悎娓告垙鐨凷G鍑芥暟鍊兼槸姣忎釜緇勫悎娓告垙鐨勫嚱鏁板肩殑鍜屻?/span>錛堣繖閲岀殑鍜屽畾涔変負寮傛垨鎿嶄綔錛?br>銆銆<br>銆銆SG鍒嗚В瀹氱悊鐨勮瘉鏄庝笉鏄緢闅撅紝鍏跺疄鍜孨im鐨勮瘉鏄庡緢鍍忋傛牴鎹繖涓畾鐞嗭紝鎴戜滑灝辯煡閬撲負浠涔圢im鐨勮В娉曟槸寮傛垨鎵鏈夌殑鐭沖瓙涓暟浜嗭紝鍥犱負姣忓爢鐭沖瓙鐨凷G鍊煎氨鏄煶瀛愮殑涓暟銆係G鍒嗚В瀹氱悊鍛婅瘔鎴戜滑浠諱綍SG娓告垙閮藉彲浠ヨ漿鍖栨垚Nim娓告垙鏉ュ仛銆?br>銆銆Nim涓殑涓涓彉褰㈠氨鏄嬁璧版渶鍚庝竴鍧楃煶瀛愮殑浜虹畻杈撱傞氳繃淇敼SG鐨勮綆楄鍒欙紝鍙互寰楀嚭鐩稿悓鐨勭粨璁猴紙鍥犱負褰撶煶瀛愪釜鏁版槸1鐨勬椂鍊橲G鍊間負0錛屽洜姝よ鍗曠嫭澶勭悊錛夛紱褰撶劧涔熷彲浠ュ埄鐢ㄤ竴涓彨鍋歋J瀹氱悊鐨勬柟娉曟潵鍋氾紝渚濈劧鏄澶勭悊褰撴墍鏈夊爢鐨凷G鍊間笉澶т簬1鐨勬儏鍐點?br><br>銆愬崥寮堝熀鏈ā鍨嬨?br>銆銆闄や簡Nim妯″瀷錛屽緢澶氭ā鍨嬮兘鐪嬩技澶嶆潅錛屾渶鍚庨兘鍒掑綊鍒頒簡Nim妯″瀷涓婏紝鐒跺悗鍒╃敤SG鍒嗚В鏉ュ仛鐨勩傚湪璇佹槑涓ょ妯″瀷絳変環鐨勬椂鍊欙紝鍙互閫氳繃璁$畻SG鍊煎垽鏂槸鍚︾浉鍚岋紝鎴栬呴氳繃鍒ゆ柇蹇呰儨絳栫暐鐨勮蛋娉曞皢鍏惰漿鍖栦負Nim銆傝澶氭ā鍨嬮潪甯哥殑紲炲錛屽叾鑾瘋儨絳栫暐鍙堝崈宸竾鍒紝鍥犳鏃犳硶涓涓鍒椾婦錛屼絾鏄帉鎻′竴浜涚粡鍏告ā鍨嬫槸蹇呴』鐨勶紝榪欐牱閫氳繃妯″瀷鐨勮漿鍖栧彲浠ョ畝鍖栭棶棰樼殑闅懼害銆?br>銆銆<span style="background-color: yellow;">緇忓吀妯″瀷1錛歂im鍙樼銆?/span>鍖呮嫭錛?br>銆銆銆銆(1) 妤兼Nim銆傛妸濂囨暟鍙伴樁鐨勭煶瀛愪綔涓篘im錛屼簩鑰呯瓑浠鳳紝鍥犱負蹇呰儨鐨勭瓥鐣ユ槸鐩稿悓鐨勩?br>銆銆銆銆(2) 姣忔鍙互鍙杒鍫嗭紝榪欎釜鏄粡鍏哥殑Moore Nim銆傚畠鏄硾鍖栫殑Nim娓告垙銆?br>銆銆銆銆(3) 涓ゅ爢鐭沖瓙錛屾瘡嬈″彲浠ュ彇涓鍫嗘垨涓ゅ爢錛屼粠涓ゅ爢鍙栧緱鏃跺欎釜鏁板繀欏葷浉鍚岋紝璋佸厛鍙栧畬鑾瘋儨銆傝繖涓槸钁楀悕鐨勫▉浣愬か鍗氬紙錛岃窡榛勯噾鍒嗗壊鏁版湁鍏籌紝鍏蜂綋璇佹槑涓嶆槸寰堟竻妤氾紝浣嗘槸鐢⊿G鍊兼墦琛ㄥ彲浠ユ壘鍑鴻寰嬨備唬鐮佸涓嬶細 <br> <div style="border: 1px solid #cccccc; padding: 4px 5px 4px 4px; background-color: #eeeeee; font-size: 13px; width: 98%;"><!--<br><br>Code highlighting produced by Actipro CodeHighlighter (freeware)<br>http://www.CodeHighlighter.com/<br><br>--><span style="color: #000000;">#include </span><span style="color: #000000;"><</span><span style="color: #000000;">cstdio</span><span style="color: #000000;">></span><span style="color: #000000;"><br>#include </span><span style="color: #000000;"><</span><span style="color: #000000;">cmath</span><span style="color: #000000;">></span><span style="color: #000000;"><br>#include </span><span style="color: #000000;"><</span><span style="color: #000000;">algorithm</span><span style="color: #000000;">></span><span style="color: #000000;"><br></span><span style="color: #0000ff;">using</span><span style="color: #000000;"> </span><span style="color: #0000ff;">namespace</span><span style="color: #000000;"> std;<br><br></span><span style="color: #0000ff;">int</span><span style="color: #000000;"> main()<br>{<br>    </span><span style="color: #0000ff;">const</span><span style="color: #000000;"> </span><span style="color: #0000ff;">double</span><span style="color: #000000;"> k </span><span style="color: #000000;">=</span><span style="color: #000000;"> (sqrt(</span><span style="color: #000000;">5.0</span><span style="color: #000000;">) </span><span style="color: #000000;">+</span><span style="color: #000000;"> </span><span style="color: #000000;">1</span><span style="color: #000000;">) </span><span style="color: #000000;">/</span><span style="color: #000000;"> </span><span style="color: #000000;">2.0</span><span style="color: #000000;">;<br>    </span><span style="color: #0000ff;">int</span><span style="color: #000000;"> a, b, t;<br><br>    </span><span style="color: #0000ff;">while</span><span style="color: #000000;"> (scanf(</span><span style="color: #000000;">"</span><span style="color: #000000;">%d %d</span><span style="color: #000000;">"</span><span style="color: #000000;">, </span><span style="color: #000000;">&</span><span style="color: #000000;">a, </span><span style="color: #000000;">&</span><span style="color: #000000;">b) </span><span style="color: #000000;">==</span><span style="color: #000000;"> </span><span style="color: #000000;">2</span><span style="color: #000000;">)<br>    {<br>        </span><span style="color: #0000ff;">if</span><span style="color: #000000;"> (a </span><span style="color: #000000;">></span><span style="color: #000000;"> b)<br>            swap(a, b);<br>        t </span><span style="color: #000000;">=</span><span style="color: #000000;"> b </span><span style="color: #000000;">-</span><span style="color: #000000;"> a;<br>        </span><span style="color: #0000ff;">if</span><span style="color: #000000;"> (a </span><span style="color: #000000;">==</span><span style="color: #000000;"> (</span><span style="color: #0000ff;">int</span><span style="color: #000000;">)(t </span><span style="color: #000000;">*</span><span style="color: #000000;"> k))<br>            puts(</span><span style="color: #000000;">"</span><span style="color: #000000;">0</span><span style="color: #000000;">"</span><span style="color: #000000;">);<br>        </span><span style="color: #0000ff;">else</span><span style="color: #000000;"><br>            puts(</span><span style="color: #000000;">"</span><span style="color: #000000;">1</span><span style="color: #000000;">"</span><span style="color: #000000;">);<br>    }<br><br>    </span><span style="color: #0000ff;">return</span><span style="color: #000000;"> </span><span style="color: #000000;">0</span><span style="color: #000000;">;<br>}</span></div> <br>銆銆銆銆(4) Subtraction Games銆備竴縐嶉氱敤鐨凬im娓告垙錛屾瘡嬈′粠鍙敤鐘舵侀泦鍚堜腑閫夋嫨涓嬩竴姝ョ殑鐘舵侊紝鏈夊緢澶氬彉褰紝鏍稿績鎬濇兂榪樻槸璁$畻SG鍑芥暟鍊箋?br>銆銆銆銆(5) Take-and-Break Game銆傛瘡嬈℃妸灞闈㈠垎鎴愬涓狽im瀛愭父鎴忥紝鍒╃敤SG鍒嗚В瀹氱悊姹傚嚭瀵瑰簲鐨凷G鍊箋?br>銆銆<span style="background-color: yellow;">緇忓吀妯″瀷2錛氱炕紜竵娓告垙(Coin Turning Game)</span><br>銆銆銆銆(1) 涓緇寸殑緲葷‖甯佹父鎴忥紝姣忔鍙互緲?涓垨涓や釜銆傞氳繃鍗曠嫭鑰冭檻姣忎釜鍙互緲葷殑紜竵鍙戠幇錛孋oin Turning Game鐨凷G鍊煎拰Nim絳変環錛屽洜姝や袱涓ā鍨嬬瓑浠楓傞渶瑕佹敞鎰忕殑鏄紝璁稿緲葷‖甯佹父鎴忔牴鎹鐩殑瑕佹眰錛屼竴鑸紪鍙蜂粠0寮濮嬨?br>銆銆銆銆(2) 涓緇寸殑緲葷‖甯佹父鎴忥紝姣忔鍙互緲?涓垨涓や釜錛岄檺瀹氫簡緲葷浜屾灇紜竵鐨勮寖鍥達紝閭d箞灝卞拰Subtraction Game絳変環浜嗐?br>銆銆銆銆(3) 涓緇寸殑緲葷‖甯佹父鎴忥紝姣忔鍙互緲?涓?涓垨3涓紝榪欎釜娓告垙鍙仛Mock Turtles錛屾湁涓涓濂囩殑瑙勫緥錛屾槸Odious Number搴忓垪銆?br>銆銆銆銆(4) 楂樼淮鐨勭炕紜竵娓告垙錛岄渶瑕佺敤鍒癗im縐拰Tartan瀹氱悊銆?br>銆銆緲葷‖甯佹ā鍨嬬殑鍙樺寲鏇村錛屽緢澶氭ā鍨嬮兘鏈変竴浜涘濡欑殑瑙勫緥錛岄渶瑕佹墦琛ㄦ墠鑳藉彂鐜般?br>銆銆<span style="background-color: yellow;">緇忓吀妯″瀷3錛氬垹杈規父鎴?Green Hackenbush)</span><br>銆銆銆銆(1) 鏍戠殑鍒犺竟娓告垙錛欳olon鍘熺悊璇佹槑榪欑妯″瀷鍜孨im渚濈劧鏄瓑浠風殑錛屽涓弶鐨凷G鍊煎紓鎴栧氨鏄搴旀牴鑺傜偣鐨凷G鍊箋?br>銆銆銆銆(2) 鏃犲悜鍥懼垹杈規父鎴忥細鍒╃敤Fursion瀹氱悊鏀剁緝鍦堬紝鐒跺悗灝辮漿鎹㈡垚鏍戠殑鍒犺竟娓告垙浜嗭紝涓嶈繃榪欎釜瀹氱悊榪樹笉浼氳瘉銆? <br><br>娉細鏈枃浣滀簬2009騫?鏈?鏃?09鐐?3鍒?br><br> <img src ="http://m.shnenglu.com/sdfond/aggbug/107364.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://m.shnenglu.com/sdfond/" target="_blank">sdfond</a> 2010-02-06 08:55 <a href="http://m.shnenglu.com/sdfond/archive/2010/02/06/107364.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item><item><title>PKU 3244 Difference between Tripletshttp://m.shnenglu.com/sdfond/archive/2009/07/14/89999.htmlsdfondsdfondTue, 14 Jul 2009 02:34:00 GMThttp://m.shnenglu.com/sdfond/archive/2009/07/14/89999.htmlhttp://m.shnenglu.com/sdfond/comments/89999.htmlhttp://m.shnenglu.com/sdfond/archive/2009/07/14/89999.html#Feedback0http://m.shnenglu.com/sdfond/comments/commentRss/89999.htmlhttp://m.shnenglu.com/sdfond/services/trackbacks/89999.html銆銆瀹氫箟涓や釜涓夊厓緇処(xi, yi, zi)鍜孞(xj, yj, zj)錛屼粬浠殑宸負D(I, J) = max{xi - xj, yi - yj, zi - zj} - min{xi - xj, yi - yj, zi - zj}錛岀粰瀹歯涓笁鍏冪粍錛坣 <= 200000錛夛紝姹備換鎰忎袱涓笁鍏冪粍鐨勫樊鐨勫拰銆?br>
銆愰鐩垎鏋愩?br>銆銆鏁版嵁鑼冨洿闈炲父澶э紝鏋氫婦蹇呯劧涓嶅彲錛岄渶瑕佹暟瀛︽柟娉曘傝繖涓鐩閥濡欎箣澶勫湪浜庯紝妯″瀷緇忚繃浜嗗眰灞傜殑鍖呰錛岃鎯充竴涓嬪瓙鏈夋兂娉曡繕鐪熶笉瀹規槗銆傛棦鐒朵笉鑳芥灇涓句簡錛岃繖涓猰ax鍜宮in鎿嶄綔灝變笉濂藉姙浜嗭紝搴旇璁炬硶鍘繪帀銆俶ax{a, b, c} - min{a, b, c} = |a - b| + |b - c| + | c - a| / 2錛岃繖涓叕寮忓簲璇ヤ笉闅炬兂鍒幫紝浣嗘槸榪欏彧鏄涓姝ワ紝鍥犱負寮曡繘浜嗙粷瀵瑰鹼紝渚濈劧涓嶅ソ鍋氥傚彲浠ュ厛綆楀嚭鍒嗗瓙錛屾渶鍚庡啀闄?銆傛帴涓嬫潵闇瑕佷竴涓瓑浠峰彉鎹紝浠 - b涓轟緥錛宎 - b = xi - xj - yi + yj = (xi - yi) - (xj - yj)錛屽悓鐞嗘妸b - c銆乧 - a閮藉啓鎴愯繖縐嶅艦寮忋傝繖涓姝ュ彉鎹㈢湅浼間綔鐢ㄤ笉澶э紝浣嗘槸鍋囪鎴戜滑綆楀嚭鎵鏈夌殑xi - yi涔嬪悗錛坕 = 0... n - 1錛夛紝灝嗗叾鎺掑簭錛屼細鍙戠幇錛屽浜庣i涓獂i - yi錛屽畠鍓嶉潰鐨勯兘姣斿畠灝忥紝鍚庨潰鐨勯兘姣斿畠澶с傝屽疄闄呬笂錛岀敱浜庢眰浠繪剰涓や釜涓夊厓緇勭殑宸紝鑲畾xi - yi浼氬拰浠繪剰鐨剎j - yj閮戒綔宸殑錛屽姞浜嗙粷瀵瑰煎悗錛屽畠瀵規渶鍚庣殑緇撴灉灝變細璐$尞i涓?xi - yi)錛宯 - i - 1涓?(xi - yi)銆傚悓鏍風殑鏂規硶綆楀嚭鎵鏈夌殑(yi - zi)鍜?zi - xi)錛岀粨鏋滃氨鑳藉姹傚嚭鏉ヤ簡銆傜畻娉曞鏉傚害O(n * logn)銆?br>
銆愰鐩葷粨銆?br>銆銆榪欐槸涓閬撲笉閿欑殑棰樼洰錛岄鍏堣冨療浜嗗叕寮忕殑鍙樺艦錛岄渶瑕佹敼鍐檓ax - min鎿嶄綔錛屼箣鍚庣殑絳変環鍙樻崲鍜屾帓搴忕殑鎬濇兂閮介潪甯稿煎緱鍊熼壌銆?br>棰樼洰浠g爜錛?br>
#include <cstdio>
#include 
<algorithm>
using namespace std;
const int N = 200010;

int x[N], y[N], z[N];
int main()
{
    
int n, a, b, c;

    
while (scanf("%d"&n) == 1 && n)
    {
        
for (int i = 0; i < n; i++)
        {
            scanf(
"%d %d %d"&a, &b, &c);
            x[i] 
= a - b;
            y[i] 
= b - c;
            z[i] 
= c - a;
        }
        sort(x, x 
+ n);
        sort(y, y 
+ n);
        sort(z, z 
+ n);
        
long long ans = 0;
        
for (int i = 0; i < n; i++)
            ans 
+= (2 * i + 1 - n) * (long long)(x[i] + y[i] + z[i]);
        printf(
"%I64d\n", ans / 2);
    }

    
return 0;
}


sdfond 2009-07-14 10:34 鍙戣〃璇勮
]]>
PKU 1723 SOLDIERShttp://m.shnenglu.com/sdfond/archive/2009/06/25/88486.htmlsdfondsdfondThu, 25 Jun 2009 02:13:00 GMThttp://m.shnenglu.com/sdfond/archive/2009/06/25/88486.htmlhttp://m.shnenglu.com/sdfond/comments/88486.htmlhttp://m.shnenglu.com/sdfond/archive/2009/06/25/88486.html#Feedback0http://m.shnenglu.com/sdfond/comments/commentRss/88486.htmlhttp://m.shnenglu.com/sdfond/services/trackbacks/88486.html銆銆棰樼洰澶ф剰鏄粰瀹歯涓偣鐨勫潗鏍囷紙n <= 10000錛夛紝闂妸榪欎簺鐐圭Щ鍔ㄥ埌涓妯騫朵笖涓涓尐鐫涓涓紙鍏蜂綋浣嶇疆浠繪剰錛夌殑鏈灝戠Щ鍔ㄦ鏁幫紙鍏朵腑姣忔鍙兘鍚戜笂涓嬪乏鍙崇Щ鍔ㄤ竴涓潗鏍囷級銆?br>銆銆榪欎釜棰樼洰浣撶幇浜嗚漿鍖栫殑鎬濇兂銆傞鍏堣冭檻榪欐牱鐨勯棶棰橈細涓涓暟杞翠笂鏈塶涓潗鏍囷紝闂妸榪檔涓潗鏍囩Щ鍔ㄥ埌涓涓偣涓婃渶灝戠Щ鍔ㄦ鏁幫紝鍏朵腑姣忔縐誨姩涓涓牸瀛愩傛牴鎹腑浣嶆暟鐨勫畾涔夛紝鎶婃墍鏈夊潗鏍囨帓搴忓悗絎琻 / 2涓潗鏍囨槸涓綅鏁幫紝鎶婃墍鏈夊潗鏍囩Щ鍔ㄥ埌榪欎笂闈㈢Щ鍔ㄦ鏁版渶灝忋傝瘉鏄庡緢瀹規槗鎯沖埌錛屽洜涓哄鏋滀笉榪欐牱鐨勮瘽錛屾妸鐩爣鍧愭爣寰宸﹀鉤縐昏繕鏄線鍙沖鉤縐伙紝鍔垮繀閫犳垚宸﹀崐閮ㄧ殑鍧愭爣闆嗕綋鍙樺寲1錛屽彸鍗婇儴鐨勫潗鏍囦篃闆嗕綋鍙樺寲1錛屽鏋滃乏鍙沖崐閮ㄥ潗鏍囩殑涓暟涓嶅悓錛岄偅涔堟樉鐒跺氨涓嶆槸鏈浼樼殑浜嗐?br>銆銆鎺ヤ笅鏉ヨ冭檻棰樼洰錛岄鐩腑x鍜寉鐨勭Щ鍔ㄦ槸瀛ょ珛鐨勶紝鍙互鍒嗗紑璁ㄨ銆倅鐨勭Щ鍔ㄦ柟娉曞拰涓婇潰璁ㄨ鐨勬儏鍐典竴鏍鳳紝鐜板湪鑰冭檻x鐨勭Щ鍔ㄣ倄鐨勭Щ鍔ㄨ姹傛渶緇堟槸涓涓尐鐫涓涓殑錛寈鎺掑ソ搴忎箣鍚庯紝鍋囪鏈緇堟墍鏈夌偣浠0涓哄乏绔偣渚濇鎺掑紑錛屽搴旂殑鐐瑰垎鍒負x0, x1...閭d箞闂鐨勭瓟妗堝氨絳変簬鎶婅繖n涓潗鏍囦緷嬈″搴旂殑鎸埌x0鍒皒n-1涓婄殑姝ユ暟銆傚鏋滄垜浠妸榪檔涓洰鏍囩偣鍒嗗埆閮界Щ鍔ㄥ埌x0涓婏紝閭d箞闂灝辮漿鍖栨垚浜嗕腑浣嶆暟闂浜嗐傝冭檻鎶妜i縐誨姩鍒皒0涓婏紝瑕佽姳璐筰姝ワ紝涓轟簡淇濊瘉闂鏄瓑浠峰彉鎹㈢殑錛屽簲璇ユ妸xi鍦ㄥ師鍧愭爣涓搴旂殑xi'涔熺浉搴旂殑鍚戝乏縐誨姩i姝ワ紝榪欐牱xi'縐誨姩鍒皒i鐨勪唬浠峰氨鏄笉鍙樼殑銆傝xi'宸︾Щi姝ュ悗鐨勬柊浣嶇疆鏄痻i''錛岄偅涔堥棶棰樺氨杞寲鎴愶細鎶妜0''鍒皒n-1''榪檔涓偣縐誨姩鍒頒竴涓潗鏍囩殑鏈灝忔鏁幫紝鐢ㄤ腑浣嶆暟鐨勬柟娉曞氨鍙互鍋氬嚭鏉ヤ簡銆?br>銆銆榪欎釜棰樼洰鐨勫閥濡欎箣澶勫湪浜庢妸涓涓湭鐭ラ棶棰樿漿鍖栨垚涓涓凡鐭ラ棶棰樸傝漿鍖栫殑鎬濇兂鍦ㄦ暟瀛︿腑鐢ㄧ殑寰堝錛屽簲璇ュ澶氱粌涔犮?br>
棰樼洰浠g爜錛?br>

#include <cstdio>
#include 
<algorithm>
using namespace std;
const int N = 10010;

int main()
{
    
int x[N], y[N], n;

    
while (scanf("%d"&n) == 1)
    {
        
for (int i = 0; i < n; i++)
            scanf(
"%d %d"&x[i], &y[i]);
        sort(x, x 
+ n);
        sort(y, y 
+ n);
        
for (int i = 0; i < n; i++)
            x[i] 
-= i;
        sort(x, x 
+ n);
        
int ans = 0;
        
for (int i = 0; i < n / 2; i++)
            ans 
+= x[n-i-1- x[i] + y[n-1-i] - y[i];
        printf(
"%d\n", ans);
    }

    
return 0;
}


sdfond 2009-06-25 10:13 鍙戣〃璇勮
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HOJ 2565 楂樻柉娑堝厓http://m.shnenglu.com/sdfond/archive/2009/06/10/87357.htmlsdfondsdfondWed, 10 Jun 2009 13:49:00 GMThttp://m.shnenglu.com/sdfond/archive/2009/06/10/87357.htmlhttp://m.shnenglu.com/sdfond/comments/87357.htmlhttp://m.shnenglu.com/sdfond/archive/2009/06/10/87357.html#Feedback0http://m.shnenglu.com/sdfond/comments/commentRss/87357.htmlhttp://m.shnenglu.com/sdfond/services/trackbacks/87357.html 銆銆榪欎釜棰樼洰鍋氬緱濂借緵鑻︺傞鐩ぇ鎰忔槸緇欎笁涓畻鏈〃杈懼紡錛屽墠涓や釜鐩稿姞絳変簬絎笁涓紝姣忎綅鏁伴兘鐢ㄥ瓧姣嶄唬鏇匡紝闂渶鍚庡瓧姣嶅搴旂殑鏁版槸澶氬皯銆傛暟鎹寖鍥磏 <= 26銆傜敱浜庤繘浣嶄笉紜畾錛屽洜姝ら渶瑕佹灇涓捐繘浣嶏紝鍐嶇敤楂樻柉娑堝厓姹傝В銆傛垜鎶ョ潃璇曚竴璇曠殑鎬佸害鏁蹭簡涓涓? ^ n * n ^ 3鐨勭▼搴忎笂鍘伙紝鏋滅劧瓚呮椂浜嗐備笉鐭ラ亾搴旇濡備綍浼樺寲錛屽埌緗戜笂鐪嬩簡涓涓嬶紝鍥犱負姣忔鏋氫婦鐨勯兘鏄父鏁幫紝鍥犳鍙互鍏堟妸姣忎釜鏈煡鏁扮敤甯擱噺琛ㄧず鍑烘潵錛岃繖鏍鋒瘡嬈℃灇涓懼洖甯︽眰瑙g殑澶嶆潅搴﹀氨闄嶅埌浜哋(n ^ 2)銆傛劅瑙夎繖縐嶅仛娉曞緢宸у錛屼笉榪囧疄鐜扮殑鏃跺欏嚭浜嗗緢澶氶棶棰橈紝鎼炰簡涓涓嬪崍鎵嶆悶瀹? -!
銆銆棣栧厛闇瑕佷繚瀛樺浜庢瘡涓彉閲忥紝瀹冨搴旂殑姣忎釜甯告暟鐨勭郴鏁版槸澶氬皯銆傚紑濮嬬殑鏃跺欐垜鍒楁柟紼嬬殑鏂瑰悜鎯抽敊浜嗭紝鐩稿綋鎴愭ān鍩熺殑鏂圭▼緇勬潵姹傝В銆傜粨鏋滃啓浜嗗緢涔呬箣鍚庡彂鐜板洜涓簄涓嶄竴瀹氭槸绱犳暟錛屾墍浠ユ眰瑙g殑鏃跺欒В鍙兘鏈夊涓紝榪欐牱鐨勮瘽灝辨瘮杈冨鏉備簡銆傚悗鏉ヤ竴鎬掍箣涓嬬儲鎬у綋鎴愬疄鏁板煙鏉ユ眰瑙o紝閲嶆柊鍒椾簡鏂圭▼錛岃繖鏍瘋В灝辨槸鍞竴鐨勪簡錛屼絾鏄腑闂磋繍綆楀叏鏄誕鐐規暟錛屽緢鎷呭績綺懼害闂錛屼氦涓婂幓灞呯劧榪囦簡銆?br>銆銆榪欎釜棰樼洰鍔犻熸秷鍏冪殑鎬濇兂榪樻槸寰堝煎緱鍊熼壌鐨勶紝楂樻柉娑堝厓鐨勪紭鍖栭棶棰樹笉澶氾紝浣嗘槸鎰熻閮芥尯鏈夋剰鎬濓紝灝卞儚鐢ㄥ雞鍥懼姞閫熼珮鏂秷鍏冦傛牴鎹柟紼嬬殑涓嶅悓鐗圭偣鏉ラ夋嫨鍚堥傜殑浼樺寲鏂規硶寰堥噸瑕佸晩銆?



sdfond 2009-06-10 21:49 鍙戣〃璇勮
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鍗氬紙璁虹殑涓浜涢鐩?/title><link>http://m.shnenglu.com/sdfond/archive/2009/05/31/86318.html</link><dc:creator>sdfond</dc:creator><author>sdfond</author><pubDate>Sun, 31 May 2009 13:53:00 GMT</pubDate><guid>http://m.shnenglu.com/sdfond/archive/2009/05/31/86318.html</guid><wfw:comment>http://m.shnenglu.com/sdfond/comments/86318.html</wfw:comment><comments>http://m.shnenglu.com/sdfond/archive/2009/05/31/86318.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://m.shnenglu.com/sdfond/comments/commentRss/86318.html</wfw:commentRss><trackback:ping>http://m.shnenglu.com/sdfond/services/trackbacks/86318.html</trackback:ping><description><![CDATA[鍏堟妸棰樼洰璐村嚭鏉ワ紝鎬葷粨鍐嶈錛?br>POJ 2234 Matches Game<br>HOJ 2533 Stone II<br>POJ 2975 Nim<br>HOJ 1367 A Stone Game<br>POJ 2505 A multiplication game<br>ZJU 3057 beans game<br>POJ 1067 鍙栫煶瀛愭父鎴?br>POJ 2484 A Funny Game<br>POJ 2425 A Chess Game<br>POJ 2960 S-Nim<br>POJ 1704 Georgia and Bob<br>POJ 1740 A New Stone Game<br>POJ 2068 Nim<br>POJ 3480 John<br>POJ 2348 Euclid's Game<br>HOJ 2645 WNim<br>POJ 3710 Christmas Game <br>POJ 3533 Light Switching Game <br> <img src ="http://m.shnenglu.com/sdfond/aggbug/86318.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://m.shnenglu.com/sdfond/" target="_blank">sdfond</a> 2009-05-31 21:53 <a href="http://m.shnenglu.com/sdfond/archive/2009/05/31/86318.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item><item><title>楂樻柉娑堝厓娉?/title><link>http://m.shnenglu.com/sdfond/archive/2009/05/26/85820.html</link><dc:creator>sdfond</dc:creator><author>sdfond</author><pubDate>Tue, 26 May 2009 09:13:00 GMT</pubDate><guid>http://m.shnenglu.com/sdfond/archive/2009/05/26/85820.html</guid><wfw:comment>http://m.shnenglu.com/sdfond/comments/85820.html</wfw:comment><comments>http://m.shnenglu.com/sdfond/archive/2009/05/26/85820.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://m.shnenglu.com/sdfond/comments/commentRss/85820.html</wfw:commentRss><trackback:ping>http://m.shnenglu.com/sdfond/services/trackbacks/85820.html</trackback:ping><description><![CDATA[銆銆楂樻柉娑堝厓娉曠敤浜庢眰瑙g嚎鎬ф柟紼嬬粍錛岄噰鐢ㄩ変富鍏冪殑鏂規硶錛岀畻娉曞鏉傚害O(N ^ 3)銆傜浉搴旂殑棰樺瀷涓縐嶆槸鍦ㄥ疄鏁板煙榪涜姹傝В錛屼竴縐嶆槸鍦ㄦ暣鏁板煙姹傝В錛屼竴鑸秹鍙婂埌鍙栨ā銆傚疄鏁板煙鐨勬眰瑙f瘮杈冪畝鍗曪紝鏁存暟鍩熼渶瑕佹敞鎰忓嚑涓棶棰樸傛āp涓瀹氭槸绱犳暟錛屽洜涓轟笉鏄礌鏁扮殑璇濇眰瑙g殑鏃跺欏彲鑳戒細鍑虹幇澶氫釜瑙o紝澶勭悊璧鋒潵姣旇緝楹葷儲銆備竴涓壒孌婄殑鎯呭喌鏄ā2鍩熶笅鐨勬眰瑙o紝鍙互閲囩敤浣嶈繍綆椾紭鍖栥傝繕鏈変竴鐐硅娉ㄦ剰鐨勬槸鍦ㄦ渶寮濮嬫瀯閫犵郴鏁扮煩闃靛拰澧炲箍鐭╅樀鐨勬椂鍊欙紝涓瀹氳鍏堟āp錛屽惁鍒欓変富鍏冪殑鏃跺欎竴浜涙āp涓?鐨勭郴鏁頒細琚閫夈?br>銆銆楂樻柉娑堝厓娉曞彟涓涓渶瑕佽璁虹殑鍦版柟灝辨槸瑙g殑鎯呭喌銆傚垎涓烘棤瑙c佸敮涓瑙e拰鏃犵┓瑙c傝繖涓夌鎯呭喌鏍規嵁綰挎т唬鏁扮殑鐭ヨ瘑寰堝鏄撳垽鏂紝涓昏灝辨槸鐪嬬郴鏁伴樀鐨勭З鍜屽騫塊樀鐨勭З銆傚鏋滄煇涓嬈¢変富鍏冨彂鐜板綋鍓嶅垪鐨勭郴鏁伴兘涓?錛岄偅涔堝搴旂殑鍙橀噺鏄竴涓嚜鐢卞彉鍏冿紝瑙d笉紜畾銆傝繖涓椂鍊欒璺寵繃榪欎竴鍒楋紝淇濇寔琛屼笉鍙橈紝緇х畫榪涜娑堝厓銆傚湪娑堝厓涔嬪悗鏌ョ湅澧炲箍闃電殑縐╃‘瀹氭槸鍚︽棤瑙o紝鑻ユ湁瑙e啀鏍規嵁鑷敱鍙樺厓鏄惁瀛樺湪鏉ュ垽鏂槸鍚︽槸鍞竴瑙c?br>銆銆濡傛灉瑙f槸鏃犵┓澶氫釜鐨勬椂鍊欙紝闇瑕佹灇涓懼彉鍏冪殑鍙栧箋備竴鑸敤浜庡鐞嗚В絀洪棿寰堝皬鐨勬儏鍐碉紝姣斿鍦ㄦā2鍩熶笂鐨勬眰瑙c傛灇涓懼彉鍏冨悗鏃犻渶閲嶆柊鍒楁柟紼嬶紝鍙渶榪涜涓嬈″洖甯︽壘瑙e嵆鍙?<img src ="http://m.shnenglu.com/sdfond/aggbug/85820.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://m.shnenglu.com/sdfond/" target="_blank">sdfond</a> 2009-05-26 17:13 <a href="http://m.shnenglu.com/sdfond/archive/2009/05/26/85820.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item><item><title>榫欒礉鏍肩Н鍒?/title><link>http://m.shnenglu.com/sdfond/archive/2009/05/20/83506.html</link><dc:creator>sdfond</dc:creator><author>sdfond</author><pubDate>Wed, 20 May 2009 11:56:00 GMT</pubDate><guid>http://m.shnenglu.com/sdfond/archive/2009/05/20/83506.html</guid><wfw:comment>http://m.shnenglu.com/sdfond/comments/83506.html</wfw:comment><comments>http://m.shnenglu.com/sdfond/archive/2009/05/20/83506.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://m.shnenglu.com/sdfond/comments/commentRss/83506.html</wfw:commentRss><trackback:ping>http://m.shnenglu.com/sdfond/services/trackbacks/83506.html</trackback:ping><description><![CDATA[<p>銆銆榫欒礉鏍肩Н鍒嗙殑鍩烘湰鎬濇兂灝辨槸鍏堝埄鐢ㄥ鍖栨褰㈠叕寮忔妸鏇茬嚎鍒掑垎鑻ュ共灝忓尯闂達紝鎶婃瘡涓皬鍖洪棿褰撴垚姊艦鏉ユ眰鍜岋紱鐒跺悗姣忔灝嗗尯闂存暟鍔犲嶏紝鐩村埌鏀舵暃鍒頒竴瀹氱簿搴﹁寖鍥村唴涓烘銆?br>銆銆紼嬪簭鍩烘湰鍙傜収璁$畻鏂規硶鐨勪功鍐欑殑錛屼絾鏄紑濮嬪啓瀹屼箣鍚庡彂鐜板法鎱€傛壘浜嗙綉涓婁竴涓増鏈拰鎴戠殑姣旇緝涓嬶紝鍙戠幇鎴戜滑淇╁彧鏄簩緇存暟緇勭殑涓や釜緇翠唬琛ㄧ殑鍚箟浜掓崲浜嗭紝浣嗘槸鏃墮棿澶嶆潅搴﹀畬鍏ㄧ浉鍚屻傚悗鏉ユ敼浜嗕竴涓嬪彂鐜板眳鐒跺揩寰堝錛屽洤銆備箣鍚庡彲浠ヨ繃JOJ 2457銆備絾鏄粛鐒惰繃涓嶄簡HOJ 2539銆備竴鏃︽妸綺懼害璋冮珮灝盩LE錛岄儊闂楓?br>銆銆鍚庢潵鎵懼埌浜唋iuyu澶х墰鏇劇粡鍐欒繃鐨剅omberg縐垎妯℃澘錛屽彂鐜板法蹇紝鐮旂┒浜嗕竴涓嬪彂鐜頒粬鎶婇偅涓猅鏁扮粍宸у鐨勫帇緙╂垚浜嗕竴緇達紝浣嗘槸鎬繪椂闂村鏉傚害涓嶅彉錛屼笉鐭ラ亾涓轟粈涔堥偅涔堝揩錛屼篃璁告槸鍥犱負浜岀淮鏁扮粍閬嶅巻鐨勬椂鍊欏鍧姣旇緝鑰楁椂闂村惂銆傛寜鐓т粬鐨勬柟娉曟敼浜嗕笅錛屼粛鐒惰繃涓嶄簡錛屼絾鏄繖鍥炴槸WA銆傛壘浜嗗緢涔呭彂鐜板湪鏇存柊鐨勬椂鍊欐瘡嬈′箻浠ュ畾鍊煎氨浼歐A錛岀敤pow鎵嶅彲浠ヨ繃錛屼及璁℃槸鏁版嵁鐨勭簿搴︽湁闂銆傛敼浜嗕箣鍚庣粓浜庤繃浜嗭紝閫熷害寰堝揩:-)</p><img src ="http://m.shnenglu.com/sdfond/aggbug/83506.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://m.shnenglu.com/sdfond/" target="_blank">sdfond</a> 2009-05-20 19:56 <a href="http://m.shnenglu.com/sdfond/archive/2009/05/20/83506.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item><item><title>蹇熷倕閲屽彾鍙樻崲http://m.shnenglu.com/sdfond/archive/2009/05/18/83287.htmlsdfondsdfondMon, 18 May 2009 08:01:00 GMThttp://m.shnenglu.com/sdfond/archive/2009/05/18/83287.htmlhttp://m.shnenglu.com/sdfond/comments/83287.htmlhttp://m.shnenglu.com/sdfond/archive/2009/05/18/83287.html#Feedback0http://m.shnenglu.com/sdfond/comments/commentRss/83287.htmlhttp://m.shnenglu.com/sdfond/services/trackbacks/83287.html銆銆澶氶」寮忔湁涓ょ琛ㄧず錛氱郴鏁板艦寮忓拰鐐瑰艱〃紺恒傚鏋滄妸涓や釜澶氶」寮忓啓鎴愮偣鍊煎艦寮忥紝閭d箞鐩鎬箻鐨勫鏉傚害灝辨槸O(n)鐨勩侳FT鐨勫熀鏈濇兂灝辨槸閫氳繃鎶婄郴鏁板艦寮忓寲鎴愮偣鍊煎艦寮忥紝鐩鎬箻涔嬪悗鍐嶅寲鍥炴潵錛屼嬌寰楀鏉傚害闄嶅埌O(nlogn)銆傚叿浣撳氨鏄厛閫氳繃宸у鍦伴夊彇n涓鏁板崟浣嶆牴錛屽埄鐢ㄥ鏁扮殑涓浜涢潪甯稿ソ鐨勬ц川姹傚緱DFT錛屾妸榪欎竴姝ョ殑澶嶆潅搴﹂檷鍒癘(nlogn)錛岀劧鍚庡皢寰楀埌鐨勭偣鍊肩浉涔樺悗錛屽埄鐢ㄦ彃鍊煎啀鍙樻崲鎴愮郴鏁板艦寮忋傛彃鍊肩殑榪囩▼灞呯劧鍜屾眰DFT鐨勮繃紼嬫儕浜虹殑鐩鎬技錛屽鏉傚害渚濈劧涓篛(nlogn)銆?br>銆銆鍦ㄥ疄鐜扮殑鏃跺欏熀鏈弬鐓х畻娉曞璁猴紝鎰熻閫掑綊涓嶅お濂藉啓錛屽氨鍐欎簡涓凱浠g殑銆侼涔呬笉鐢ㄥ鏁頒簡錛岃繛鍩烘湰榪愮畻閮藉繕浜嗭紝瀵艱嚧瀹炵幇鐨勬椂鍊欏嚭浜嗕竴鍫嗛敊錛屽悗鏉ュソ涓嶅鏄撳啓濂戒簡錛岀粨鏋滃嵈涓鐐歸兘涓嶉潬璋便傛煡浜嗗ソ涔呮墠鍙戠幇錛屽垵濮媤鏄?鐨勬椂鍊欙紝鎴戞妸瀹為儴鍜岃櫄閮ㄩ兘璁炬垚1浜嗭紝鍥с傚疄闄呬笂铏氶儴搴旇鏄?銆傛敼瀹屽悗鍙戠幇澶氶」寮忕殑琛ㄧず鍙堝嚭浜嗛棶棰橈紝鍚庢潵鍙戠幇鎴戞妸緋繪暟鐨勯『搴忓啓鍙嶄簡銆傜劧鍚庡埄鐢ㄨ繖涓仛浜咹DU 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sdfond 2009-05-18 16:01 鍙戣〃璇勮
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