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澶滄繁浜洪潤鍐欑畻娉曪紙鍗佷笁錛?- 鏍?wèi)鐘舵暟缁?/title><link>http://www.shnenglu.com/menjitianya/archive/2015/11/02/212171.html</link><dc:creator>鑻遍泟鍝噷鍑烘潵</dc:creator><author>鑻遍泟鍝噷鍑烘潵</author><pubDate>Mon, 02 Nov 2015 14:53:00 GMT</pubDate><guid>http://www.shnenglu.com/menjitianya/archive/2015/11/02/212171.html</guid><wfw:comment>http://www.shnenglu.com/menjitianya/comments/212171.html</wfw:comment><comments>http://www.shnenglu.com/menjitianya/archive/2015/11/02/212171.html#Feedback</comments><slash:comments>4</slash:comments><wfw:commentRss>http://www.shnenglu.com/menjitianya/comments/commentRss/212171.html</wfw:commentRss><trackback:ping>http://www.shnenglu.com/menjitianya/services/trackbacks/212171.html</trackback:ping><description><![CDATA[<a >澶滄繁浜洪潤鍐欑畻娉曪紙鍗佷笁錛? 鏍?wèi)鐘舵暟缁?br /><img src="http://www.shnenglu.com/images/cppblog_com/menjitianya/鍏紬鍙?png" border="0" alt="" /></a><img src ="http://www.shnenglu.com/menjitianya/aggbug/212171.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.shnenglu.com/menjitianya/" target="_blank">鑻遍泟鍝噷鍑烘潵</a> 2015-11-02 22:53 <a href="http://www.shnenglu.com/menjitianya/archive/2015/11/02/212171.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item><item><title>澶滄繁浜洪潤鍐欑畻娉曪紙浜岋級 - 鍔ㄦ佽鍒?/title><link>http://www.shnenglu.com/menjitianya/archive/2015/10/23/212084.html</link><dc:creator>鑻遍泟鍝噷鍑烘潵</dc:creator><author>鑻遍泟鍝噷鍑烘潵</author><pubDate>Fri, 23 Oct 2015 15:24:00 GMT</pubDate><guid>http://www.shnenglu.com/menjitianya/archive/2015/10/23/212084.html</guid><wfw:comment>http://www.shnenglu.com/menjitianya/comments/212084.html</wfw:comment><comments>http://www.shnenglu.com/menjitianya/archive/2015/10/23/212084.html#Feedback</comments><slash:comments>9</slash:comments><wfw:commentRss>http://www.shnenglu.com/menjitianya/comments/commentRss/212084.html</wfw:commentRss><trackback:ping>http://www.shnenglu.com/menjitianya/services/trackbacks/212084.html</trackback:ping><description><![CDATA[<a title="澶滄繁浜洪潤鍐欑畻娉曪紙浜岋級 - 鍔ㄦ佽鍒?>澶滄繁浜洪潤鍐欑畻娉曪紙浜岋級 - 鍔ㄦ佽鍒?br /><img src="http://www.shnenglu.com/images/cppblog_com/menjitianya/鍏紬鍙?png" border="0" alt="" /></a><img src ="http://www.shnenglu.com/menjitianya/aggbug/212084.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.shnenglu.com/menjitianya/" target="_blank">鑻遍泟鍝噷鍑烘潵</a> 2015-10-23 23:24 <a href="http://www.shnenglu.com/menjitianya/archive/2015/10/23/212084.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item><item><title>澶滄繁浜洪潤鍐欑畻娉曪紙涓錛?- 鎼滅儲(chǔ)鍏ラ棬http://www.shnenglu.com/menjitianya/archive/2015/10/09/211980.html鑻遍泟鍝噷鍑烘潵鑻遍泟鍝噷鍑烘潵Fri, 09 Oct 2015 14:28:00 GMThttp://www.shnenglu.com/menjitianya/archive/2015/10/09/211980.htmlhttp://www.shnenglu.com/menjitianya/comments/211980.htmlhttp://www.shnenglu.com/menjitianya/archive/2015/10/09/211980.html#Feedback0http://www.shnenglu.com/menjitianya/comments/commentRss/211980.htmlhttp://www.shnenglu.com/menjitianya/services/trackbacks/211980.html澶滄繁浜洪潤鍐欑畻娉曪紙涓錛? 鎼滅儲(chǔ)鍏ラ棬



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浜岀淮綰挎鏍?/title><link>http://www.shnenglu.com/menjitianya/archive/2015/10/06/211956.html</link><dc:creator>鑻遍泟鍝噷鍑烘潵</dc:creator><author>鑻遍泟鍝噷鍑烘潵</author><pubDate>Tue, 06 Oct 2015 10:56:00 GMT</pubDate><guid>http://www.shnenglu.com/menjitianya/archive/2015/10/06/211956.html</guid><wfw:comment>http://www.shnenglu.com/menjitianya/comments/211956.html</wfw:comment><comments>http://www.shnenglu.com/menjitianya/archive/2015/10/06/211956.html#Feedback</comments><slash:comments>0</slash:comments><wfw:commentRss>http://www.shnenglu.com/menjitianya/comments/commentRss/211956.html</wfw:commentRss><trackback:ping>http://www.shnenglu.com/menjitianya/services/trackbacks/211956.html</trackback:ping><description><![CDATA[     鎽樿:       浜岀淮綰挎鏍?wèi)鏈涓昏鐢ㄤ簬騫抽潰緇熻闂銆傜被浼間竴緇寸嚎孌墊爲(wèi)錛屾渶緇忓吀鐨勫氨鏄眰鍖洪棿鏈鍊鹼紙鎴栧尯闂村拰錛夛紝鎺ㄥ箍鍒頒簩緇達(dá)紝姹傚緱灝辨槸鐭╁艦鍖哄煙鏈鍊鹼紙鎴栫煩褰㈠尯鍩熷拰錛夛紝瀵逛簬鐭╁艦鍖哄煙鍜岋紝浜岀淮鏍?wèi)鐘舵暟缁勬洿鍔犻珮鏁堝Q岃岀煩褰㈠尯鍩熸渶鍊鹼紝鏇村姞楂樻晥鐨勬柟娉曟槸浜岀淮RMQ錛屼絾鏄簩緇碦MQ涓嶆敮鎸佸姩鎬佹洿鏂幫紝鎵浠ヤ簩緇寸嚎孌墊爲(wèi)榪樻槸鏈夌敤姝︿箣鍦扮殑銆?nbsp;     濡傛灉瀵逛竴緇寸嚎孌墊爲(wèi)宸茬粡椹捐交灝辯啛錛岄偅涔堢洿...  <a href='http://www.shnenglu.com/menjitianya/archive/2015/10/06/211956.html'>闃呰鍏ㄦ枃</a><img src ="http://www.shnenglu.com/menjitianya/aggbug/211956.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.shnenglu.com/menjitianya/" target="_blank">鑻遍泟鍝噷鍑烘潵</a> 2015-10-06 18:56 <a href="http://www.shnenglu.com/menjitianya/archive/2015/10/06/211956.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item><item><title>AC鑷姩鏈?/title><link>http://www.shnenglu.com/menjitianya/archive/2014/07/10/207604.html</link><dc:creator>鑻遍泟鍝噷鍑烘潵</dc:creator><author>鑻遍泟鍝噷鍑烘潵</author><pubDate>Thu, 10 Jul 2014 06:26:00 GMT</pubDate><guid>http://www.shnenglu.com/menjitianya/archive/2014/07/10/207604.html</guid><wfw:comment>http://www.shnenglu.com/menjitianya/comments/207604.html</wfw:comment><comments>http://www.shnenglu.com/menjitianya/archive/2014/07/10/207604.html#Feedback</comments><slash:comments>6</slash:comments><wfw:commentRss>http://www.shnenglu.com/menjitianya/comments/commentRss/207604.html</wfw:commentRss><trackback:ping>http://www.shnenglu.com/menjitianya/services/trackbacks/207604.html</trackback:ping><description><![CDATA[     鎽樿: AC鑷姩鏈?        綆楁硶鐩殑錛?        AC鑷姩鏈轟富瑕佺敤浜庤В鍐沖妯″紡涓茬殑鍖歸厤闂錛屾槸瀛楀吀鏍?trie鏍?鐨勫彉縐嶏紝涓縐嶄吉鏍?wèi)迮灳l撴瀯(涓諱綋鏄爲(wèi)褰㈢殑錛屼絾鏄敱浜庡姞鍏ヤ簡澶辮觸鎸囬拡錛屼嬌寰楀畠鍙樻垚浜嗕竴涓湁鍚戝浘)錛泃rie鍥?鎴戠殑鐞嗚В^_^)鏄AC鑷姩鏈虹殑涓縐嶆敼閫狅紝浣垮緱鍥句腑姣忎釜緇撶偣閮?..  <a href='http://www.shnenglu.com/menjitianya/archive/2014/07/10/207604.html'>闃呰鍏ㄦ枃</a><img src ="http://www.shnenglu.com/menjitianya/aggbug/207604.html" width = "1" height = "1" /><br><br><div align=right><a style="text-decoration:none;" href="http://www.shnenglu.com/menjitianya/" target="_blank">鑻遍泟鍝噷鍑烘潵</a> 2014-07-10 14:26 <a href="http://www.shnenglu.com/menjitianya/archive/2014/07/10/207604.html#Feedback" target="_blank" style="text-decoration:none;">鍙戣〃璇勮</a></div>]]></description></item><item><title>RMQhttp://www.shnenglu.com/menjitianya/archive/2014/06/26/207420.html鑻遍泟鍝噷鍑烘潵鑻遍泟鍝噷鍑烘潵Thu, 26 Jun 2014 08:35:00 GMThttp://www.shnenglu.com/menjitianya/archive/2014/06/26/207420.htmlhttp://www.shnenglu.com/menjitianya/comments/207420.htmlhttp://www.shnenglu.com/menjitianya/archive/2014/06/26/207420.html#Feedback0http://www.shnenglu.com/menjitianya/comments/commentRss/207420.htmlhttp://www.shnenglu.com/menjitianya/services/trackbacks/207420.html闃呰鍏ㄦ枃

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KMPhttp://www.shnenglu.com/menjitianya/archive/2014/06/20/207354.html鑻遍泟鍝噷鍑烘潵鑻遍泟鍝噷鍑烘潵Fri, 20 Jun 2014 13:37:00 GMThttp://www.shnenglu.com/menjitianya/archive/2014/06/20/207354.htmlhttp://www.shnenglu.com/menjitianya/comments/207354.htmlhttp://www.shnenglu.com/menjitianya/archive/2014/06/20/207354.html#Feedback1http://www.shnenglu.com/menjitianya/comments/commentRss/207354.htmlhttp://www.shnenglu.com/menjitianya/services/trackbacks/207354.htmlKMP

        KMP綆楁硶鍙互璇?/span>鎵鏈夋暟鎹粨鏋勪功涓婇兘鏈夛紝涓婂ぇ瀛︾殑鏃跺欎篃闄嗛檰緇畫瀛﹁繃涓夋錛屾瘡嬈″瀹岀湅浼肩悊瑙d簡錛?/span>鍙槸榪囦簡涓嶅埌鍗婂勾鍙?/span>蹇樿浜嗭紝鎴栬鏄洜涓轟唬鐮佸お鐭紝鑳藉啓鍑烘潵灝變互涓鴻嚜宸變細(xì)浜嗭紝娌℃湁娣卞叆鍘葷悊瑙o紝瀵艱嚧涓嬫鍐嶆潵鐪嬬殑鏃跺欐劅瑙夊緢闄岀敓錛屼竴瀹氭槸榪欐牱鐨勩?/span>

    浠婂ぉ鐪嬩簡matrix67瀵筀MP鐨勮В閲婏紝寰堣禐錛岄檮涓婂湴鍧錛?/span>http://www.matrix67.com/blog/archives/115

    涓轟簡璁╄佸勾鐨勮嚜宸變笉鐢ㄥ湪榪熸毊鐨勬椂鍊欏啀瀛︿竴閬岾MP錛岃繕鏄喅瀹氭妸涓浜涘叧閿х殑涓滆タ璁板綍涓嬫潵錛屽鏋滈偅鏃跺欑殑鑷繁鐪嬪埌鑷繁褰撳勾鍐欑殑榪欑瘒絎旇鑳芥湁鎭嶇劧澶ф?zhèn)熺殑鎰熻锛岄偅涔堢幇鍦兏嶆槸鍦▼躬璐规棄櫁翠簡銆?/span>

      瀹氫箟錛?/span>

          S[1... n]   鐩爣涓?nbsp;                          T[1...m]   妯″紡涓?/span>

      綆楁硶鐩殑錛?/span>

          浠庣洰鏍囦覆S涓壘鍒頒竴涓瓙涓插拰妯″紡涓睺瀹屽叏鍖歸厤銆?/span>

      綆楁硶鏍稿績鎬濇兂錛?/span>

               1) 鏋氫婦i浠?鍒皀錛屽湪S[i-j...i-1]鍜孴[1...j]瀹屽叏鍖歸厤鐨勫墠鎻愪笅錛屽垽鏂璖[i]鏄惁鍜孴[j+1]鐩哥瓑錛?/span>

                        a) 濡傛灉鐩哥瓑錛岃鏄嶴[i-j...i]鍜孴[1...j+1]瀹屽叏鍖歸厤錛岄偅涔坕鍜宩閮借嚜澧?錛?/span>

                        b) 濡傛灉涓嶇浉絳夛紝鍒欓渶瑕佹壘鍒頒竴涓渶澶х殑j' < j錛屾弧瓚砈[i-j'...i-1]鍜孴[1...j']瀹屽叏鍖歸厤錛?/span>

               2) 褰搃=n鎴杍=m鐨勬椂鍊欒鏄庡尮閰嶇粨鏉燂紝鍚﹀垯閲嶅1)錛?br />

      瀵逛簬j'鍙互榪欐牱鐞嗚В錛岀敱浜庡墠鎻愭槸S[i-j...i-1]鍜孴[1...j]瀹屽叏鍖歸厤錛屽鏋滆鎵懼埌涓涓猨'婊¤凍S[i-j'...i-1]鍜孴[1...j']涔熷畬鍏ㄥ尮閰嶏紝閭d箞T[1...j']蹇呭畾涓篢[1...j]鐨勫悗緙錛?/span>璇佹槑濡備笅錛氶鍏堝皢浠ヤ笅鐨勫瓙涓茶繘琛岀紪鍙鳳細(xì) A = S[i-j...i-1]     B = T[1...j]      C = S[i-j'...i-1]     D = T[1...j']

      鍥犱負(fù)A鍜孊瀹屽叏鍖歸厤錛孋鍜孌瀹屽叏鍖歸厤錛岀敱浜嶤涓篈鐨勫悗緙錛屾墍浠涓築鐨勫悗緙銆?/span>

      褰揝[i]鍜孴[j+1]涓嶇浉絳夌殑鏃跺欓渶瑕佽皟鏁磈鐨勫鹼紝璋冩暣瀹屽悗鐨刯 = Next[j](榪欎釜Next[j]灝辨槸涔嬪墠鎵璇寸殑j')錛岄渶瑕佹弧瓚?T[1 ... Next[j] ] = = T[ j - Next[j] + 1... j ]錛?騫朵笖Next[j]鐨勫兼渶澶э紝姣旇緝涔﹂潰鐨勮娉曞氨鏄疦ext[j]琛ㄧず鍦ㄦā寮忎覆T涓互絎琷涓厓绱犱負(fù)緇撳熬鐨勬渶闀垮悗緙涓弧瓚沖畠鏄疶鐨勫墠緙鐨勫悗緙鐨勯暱搴?/span>銆?/span>

      涓句釜渚嬪瓙錛孴 = "ababaaba"鐨凬ext鏁扮粍涓?nbsp;[0, 0, 1, 2, 3, 1, 2, 3]銆?/span>

      鐢變簬Next鏁扮粍琛ㄧず鐨勫惈涔夊彧鍜岃嚜韜殑鎬ц川鏈夊叧錛屾墍浠ュ湪娌℃湁鐩爣涓茬殑鎯呭喌涓嬪悓鏍峰彲浠ユ眰鍑篘ext鏁扮粍錛孠MP鐨勭簿濡欎箣澶勫氨鍦ㄤ簬姹傝繖涓狽ext鏁扮粍浜嗐?/span>

      鍦ㄤ笂鏂囦腑鎻愬埌鐨凷鍜孴鐨勫尮閰嶄腑錛屾瘡嬈[i-j...i-1]閮芥槸灝介噺鎵懼埌鏈澶х殑j浣垮緱瀹冨拰T[1...j]瀹屽叏鍖歸厤錛屽綋鐒舵湁鍙兘鎵句笉鍒拌繖鏍風(fēng)殑j錛屾鏃朵護(hù)j = 0錛屽嵆 S[i,i-1]鍜孴[1,0]鍖歸厤(榪欐槸涓や釜絀轟覆錛岀┖涓插拰絀轟覆涔熷彲浠ュ尮閰嶏紝hohoho~~鎵浠鏄竴瀹氬瓨鍦ㄧ殑)銆傚鏋滅幇鍦ㄦ妸S鎹㈡垚T錛岄偅涔堥棶棰樺氨杞寲鎴愪簡T[i-j...i-1]鍜孴[1...j]鐨勫尮閰嶉棶棰樹簡錛屽鏋淭[i-j...i-1]鍜孴[1...j]瀹屽叏鍖歸厤錛屽茍涓擳[1...j]鏄拰T[i-j...i-1]鍖歸厤鐨勬渶闀跨殑涓詫紝閭d箞 Next[i-1] 灝辨槸 j錛堟濊冧竴涓嬬孩鑹插瓧鐨勫畾涔夊氨鏄庣櫧浜嗭級錛屼簬鏄棶棰樺氨杞寲鎴愪簡T鐨勮嚜鎴戝尮閰嶇殑榪囩▼浜嗐?br />      綆楁硶澶嶆潅搴︼細(xì)
            O(n+m)

    Next鍑芥暟鐨勬眰瑙i潪甯哥畝媧侊細(xì)

 1 #define MAXN 1000010
 2 int next[MAXN];
 3  
 4 // 浼犲叆鐨勫瓧絎︿覆涓嬫爣闇瑕佷互1寮澶?/span>
 5 void getNext(int m, char *str) {
 6 next[1] = 0;
 7 // 鏋氫婦妯″紡涓茬殑姣忎釜浣嶇疆錛屽垽鏂互褰撳墠瀛楃緇撳熬鑳藉鍖歸厤鍒扮殑鏈澶у墠緙
 8 for(int j = 0, i = 2; i <= m; i++) {
 9     // 鍦╯tr[i-j i-1]鍜宻tr[1j] 瀹屽叏鍖歸厤鐨勫墠鎻愪笅鍒ゆ柇str[i]鍜宻tr[j+1]鏄惁鐩哥瓑
10     // 濡傛灉涓嶇浉絳夛紝鍒欏噺灝廽鐨勫鹼紝鐩村埌鍖歸厤鍒板畬鍏ㄧ浉絳変綅緗?/span>
11         while( j > 0 && str[i] != str[j+1] ) j = next[j];
12         // 濡傛灉鑳藉鎵懼埌浠緇撳熬鐨勫悗緙鍜屼互j+1緇撳熬鐨勫墠緙瀹屽叏鍖歸厤錛宩鑷1銆?/span>
13         if(str[i] == str[j+1]) j ++;
14         // 榪欓噷j鏈変袱縐嶆儏鍐碉細(xì)
15         // j = 0    浠緇撳熬鐨勫悗緙鎵句笉鍒頒竴涓墠緙鍜屽畠瀹屽叏鍖歸厤
16         // j > 0    浠緇撳熬鐨勫悗緙鍜屼互j緇撳熬鐨勫墠緙瀹屽叏鍖歸厤錛屾洿鏂癗ext鍑芥暟鐨勫?/span>
17         next[i] = j;
18     } 
19 }

 

PKU 3461 Oulipo

棰樻剰錛氭眰涓涓尮閰嶄覆T鍦ㄧ洰鏍囦覆S涓殑鍑虹幇嬈℃暟銆?/span>

棰樿В錛?/span>姹傚嚭T鐨?/span>Next鏁扮粍錛岀劧鍚庡拰S榪涜KMP鍖歸厤錛屽尮閰嶆椂褰搄 = =m鐨勬椂鍊欒〃紺烘壘鍒頒竴涓彲琛岃В錛岃鏁板櫒+1錛岀劧鍚庡皢Next[j]璧嬪肩粰j錛屼嬌寰楀畠鐨勬渶闀垮墠緙鑳藉緇х畫鍜岀洰鏍囦覆榪涜鍖歸厤銆?/span>

KMP鍖歸厤榪囩▼鍜孨ext鏁扮粍鐨勬眰瑙f槸涓鏍風(fēng)殑銆?/span>

 

 1 // S[1n] 鐩爣涓?br /> 2 // T[1m] 鍖歸厤涓?nbsp;
 3 int KMP(int n, char *S, int m, char *T) {
 4     int cnt = 0;
 5     for(int j = 0, i = 1; i <= n; i++) {
 6         while( j>0 && S[i] != T[j+1]) j = next[j];
 7         if(S[i] == T[j+1]) j++;
 8         if(j == m) {
 9             cnt ++;
10             j = next[j];
11         }
12     }
13     return cnt;
14 }

 

HDU 4763 Theme Section

棰樻剰錛氱粰瀹氫竴涓暱搴︿負(fù)N(1 <= N <= 106)鐨勫瓧絎︿覆S錛岄棶鑳藉惁鍜屾ā寮忎覆EAEBE榪涜鍖歸厤鍏朵腑A鍜孊琛ㄧず浠繪剰闅忔満瀛楃錛屽鏋滆兘鍖歸厤錛岃緭鍑篍鐨勬渶澶у彲鑳介暱搴︼紝涓嶈兘鍖歸厤杈撳嚭0銆?/span>

棰樿В錛氶鍏堝埄鐢↘MP姹傚嚭S鐨凬ext鏁扮粍錛岄偅涔圫[1...Next[N]]銆丼[1...Next[Next[N]]]銆丼[1...Next[...[N]] ]蹇呭畾鑳藉拰S鐨勫悗緙榪涜瀹屽叏鍖歸厤錛屽皢榪欎簺Next[i]鍒╃敤涓嬈¤凱浠f眰鍑烘潵錛屾渶緇堢殑絳旀涓瀹氬湪榪欎簺鍊間腑錛岀劧鍚庝粠澶у埌灝忔灇涓捐繖浜涘鹼紝鍒ゆ柇鍙鎬с?/span>

鍋囪褰撳墠鏋氫婦闀垮害涓篿錛岄偅涔堝湪S[i+1 ... N-i] 涓鏋滆兘澶熸壘鍒頒竴涓暱搴︿負(fù)i鐨勫瓙涓叉弧瓚沖拰S[1...i]瀹屽叏鍖歸厤錛岄偅涔坕灝辨槸涓涓彲琛岃В錛屽張鍥犱負(fù)鏋氫婦鏄粠澶у埌灝忚繘琛岀殑錛屾墍浠灝辨槸E鍙兘鐨勬渶澶ч暱搴︺?/span>

浜庢槸闂灝辮漿鍙樻垚浜嗗垽鏂璖[i+1 ... N-i]涓槸鍚﹀瓨鍦ㄤ竴涓拰S[1...i]瀹屽叏鍖歸厤鐨勫瓙涓層傚鏋滃瓨鍦紝閭d箞蹇呭畾瀛樺湪涓涓猭( 2*i <= k <= N-i )錛屼嬌寰桽[k-i+1 ... k] = = S[1 ... i ]錛屾墍浠ュ繀瀹氭湁Next[Next[...[k]]] = = i錛屾墍浠ユ垜浠彲浠ラ鍏堝皢S[i+1 ... N-i]鍖洪棿鍐呮墍鏈夌殑Next鍊奸鍖栧悗榪涜Hash錛岀劧鍚庡湪鏋氫婦鏌愪釜闀垮害i鐨勬椂鍊欏幓Hash鏁扮粍涓壘i鏄惁琚爣璁幫紝濡傛灉琚爣璁拌鏄庡瓨鍦ㄦ煇涓猭婊¤凍S[k-i+1 ... k] = = S[1 ... i ]錛宨灝辨槸鏈澶у彲鑳介暱搴︺?/span>

 

HDU 2594 Simpsons’ Hidden Talents

棰樻剰錛氱粰瀹氫袱涓暱搴︿笉澶т簬50000鐨?/span>涓詫紝姹備袱涓覆鐨勪竴涓渶闀垮叕鍏卞瓙涓叉弧瓚沖瓙涓蹭負(fù)絎竴涓覆鐨勫墠緙錛屽茍涓斾負(fù)絎簩涓覆鐨勫悗緙銆?/span>

棰樿В錛氬皢涓や釜涓茬敤涓涓粠鏈嚭鐜拌繃鐨勫瓧絎﹁繛鎺ワ紝鎷兼垚涓涓暱搴︿負(fù)N鐨勪覆錛?/span>鐒跺悗榪涜涓嬈¤嚜鎴戝尮閰嶏紝姹傚嚭next鏁扮粍錛屾牴鎹甆ext鏁扮粍鐨勫畾涔夛紝Next[N]灝辨槸鎵姹傜殑鏈澶ч暱搴︺?/span>

 

HDU 3746 Cyclic Nacklace

棰樻剰錛氱粰瀹氫竴涓暱搴︿負(fù)N(N <= 105)鐨勫瓧絎︿覆S錛屾眰鍦ㄥ畠鐨勬湯灝炬坊鍔犲嚑涓瓧絎︿嬌寰椾粬鍙樻垚涓涓嚦灝戦噸澶嶄袱嬈$殑榪炵畫閲嶅涓詫紝瑕佹眰娣誨姞鐨勫瓧絎︽暟鏈灝戙?/span>

棰樿В錛氶鍏堝埄鐢↘MP榪涜涓嬈¤嚜鎴戝尮閰嶆眰鍑篘ext鏁扮粍錛岀劧鍚庢灇涓鵑噸澶嶄覆鐨勯暱搴錛屼護(hù)x = i * (N/i)錛屽鏋渪 - Next[x] == i錛岃鏄嶴[x]鏄疭鐨勪竴涓繛緇噸澶嶅瓙涓詫紙鎴栬呭彨榪炵畫閲嶅鍓嶇紑鏇村姞璐村垏錛夛紝鐞嗙敱寰堢畝鍗曪紝灝嗗瓧絎︿覆S[x]浠ラ暱搴涓哄崟浣嶅垎緇勶紝

S[1...i]   S[i+1...2i]  S[2i+1...3i]   ……   S[(N/i-1)i + 1...(N/i)i]

   S[1...i]   S[i+1...2i]   ……  S[(N/i-2)i + 1...(N/i-1)i]

鐢變簬x + i = = Next[x]錛屽彲浠ュ垪鍑鴻繛絳夊紡錛屾湁濡備笅絳変環(huán)鍏崇郴錛歋[1...i] = = S[i+1...2i] = = ... = = S[(N/i-1)i + 1...(N/i)i]銆?/span>

閭d箞鍓╀笅鐨勫氨鏄鐪婼[x+1...N]鏄惁涓篠鐨勫墠緙錛屽悓鏍峰彲浠ユ牴鎹甆ext鏁扮粍鐨勫畾涔夎繘琛屽垽鏂紝鐗規(guī)畩鐨勶紝褰搙 == N鏃訛紝S[x+1...N] == S[N+1,N]涓虹┖涓詫紝蹇呭畾涓篠鐨勫墠緙錛屼篃鏄弧瓚蟲潯浠剁殑錛屾灇涓炬墍鏈夋弧瓚蟲潯浠剁殑闀垮害L錛屽彇L - (N-x)鐨勬渶灝忚呭氨鏄瓟妗堜簡銆?/span>

 

PKU 2406 Power Strings

棰樻剰錛氱粰瀹氫竴涓暱搴︿笉瓚呰繃N(N <= 106)鐨勫瓧絎︿覆錛屽畠涓瀹氭槸鏌愪釜涓查噸澶岾嬈″緱鍒幫紝姹傝繖涓狵鐨勬渶澶у箋?/span>

棰樿В錛氬亣璁懼瓙涓睺閲嶅K嬈″悗寰楀埌涓睸錛岄偅涔圱鐨勯暱搴︿竴瀹氫負(fù)L = N/K(瑕佹暣闄?錛屽垯T = S[1...L]錛屽皢S鎷嗗垎鎴怟浠斤紝姣忎喚闀垮害涓篖錛屽垯鏈?/span>

S[1...L] = S[L+1...2L] = S[2L+1...3L] = ... = S[(K-1)L+1...KL]

鐢變簬瑕佷繚璇並鏈澶э紝鍔垮繀L瑕佸彇鏈灝忥紝鎵浠ユ牴鎹甆ext鍑芥暟鐨勫畾涔夛紝鏈塏ext[KL] = (K-1)L;

鍗砃ext[N] = N - L錛屾墍浠 = N - Next[N];

浣嗘槸寰楀嚭鐨勯暱搴榪樿淇濊瘉鑳借N鏁撮櫎錛屾墍浠ュ鏋滀笉鑳芥暣闄よ鏄嶭 = N錛屽嵆K = 1錛涜屽鏋滆兘鏁撮櫎錛岄偅涔圞 = N / (N - Next[N]);

 

PKU 2752 Seek the Name, Seek the Fame

棰樻剰錛氱粰瀹氫竴涓暱搴︿負(fù)N(N <= 400000)鐨勫瓧絎︿覆錛屾眰瀹冪殑鍓嶇紑絳変簬鍚庣紑鐨勬墍鏈夊瓙涓茬殑闀垮害銆?/span>

棰樿В錛氳冨療Next鏁扮粍鐨勫畾涔夈備笉鏂凱浠f眰N鐨凬ext錛孨ext[N]鐨凬ext......鐒跺悗閫嗗簭杈撳嚭鍗沖彲銆?/span>

 

 

 

HDU 3374 String Problem

棰樻剰錛氱粰瀹氫竴涓暱搴︿負(fù)N(N <= 106)鐨勫瓧絎︿覆S錛岀劧鍚庡皢瀹冭繘琛屽乏縐伙紝鎬誨叡浜х敓N涓驚鐜瓧絎︿覆錛屾眰鍏朵腑瀛楀吀搴忔渶灝忕殑涓茬殑緙栧彿浠ュ強(qiáng)榪欐牱鐨勪覆鐨勪釜鏁幫紝鍜屽瓧鍏稿簭鏈澶х殑涓茬殑緙栧彿浠ュ強(qiáng)榪欐牱鐨勪覆鐨勪釜鏁般?/span>

棰樿В錛氬厛姹傚瓧鍏稿簭鏈灝忕殑錛屽瓧鍏稿簭鏈澶х殑鍙渶瑕佸皢姣忎釜瀛楃鐢?27鍑忓幓鏈韓鍐嶆眰涓嬈″瓧鍏稿簭鏈灝忓嵆鍙紱瀹氫箟涓や釜鎸囬拡i錛宩錛宨鍒濆涓?錛宩鍒濆涓?錛屽啀瀹氫箟涓涓暱搴﹀彉閲弅 = 0錛?/span>

1) 姣旇緝S[i+k] 鍜孲[j+k]鐨勫ぇ灝忓叧緋伙細(xì)

a) 濡傛灉鐩哥瓑錛宬鑷1錛涘綋k==N鍒欒煩鍑哄驚鐜紝鍚﹀垯緇х畫1)鐨勬瘮杈冿紱

b) 濡傛灉S[i+k] < S[j+k]錛宩 += k + 1, k = 0; 

c) 濡傛灉S[i+k] > S[j+k], i += k + 1, k = 0;

2) 濡傛灉i 鍜宩鐩哥瓑錛宩鑷1錛涘綋j==N鎴杋==N鍒欒煩鍑哄驚鐜紝鍚﹀垯緇х畫1)鐨勬瘮杈冿紱

 

榪欐牱寰幆緇撴潫鍚庡鏋滐紝鍙杋鍜宩鐨勫皬鑰呭氨鏄瓟妗堛?/span>

鐒跺悗鍦ㄥ埄鐢ㄦ眰鍑烘潵鐨勪笅鏍囷紝鐢熸垚涓涓柊鐨勫瓧絎︿覆浣滀負(fù)鍖歸厤涓插拰涓涓師涓茬殑涓ゅ嶇殑涓蹭綔涓虹洰鏍囦覆榪涜KMP鍖歸厤錛屽緱鍒扮鏁般?br />

PKU 3690 Constellations

棰樻剰錛氱粰瀹?font face="Times New Roman">N*M(N<=1000, M <= 1000)鐨?/font>01鐭╅樀S錛屽啀緇欏畾T(T <= 100)涓?/font>P*Q(P <= 50, Q <= 50)鐨?/font>01鐭╅樀錛岄棶P*Q鐨勭煩闃典腑鏈夊灝戜釜鏄?/font>S鐨勫瓙鐭╅樀銆?/font>

棰樿В錛氱敱浜?font face="Times New Roman">P <= 50錛屾墍浠ユ垜浠彲浠ユ妸鎵鏈?/font>P*Q鐨勭煩闃佃繘琛屼簩榪涘埗浣嶅帇緙╋紝灝?/font>P*Q鐨勭煩闃電殑姣忎竴鍒楀帇緙╂垚涓涓?/font>64浣嶆暣鏁幫紝榪欐牱P*Q鐨勭煩闃靛氨鍙樻垚浜嗕竴涓暱搴︿負(fù)Q鐨勬暣鏁板簭鍒?/font>T錛岀敤鍚屾牱鐨勬柟寮忓N*M鐨勭煩闃佃繘琛屽帇緙╋紝鎬誨叡鍙互浜х敓(N-P+1)涓暱搴︿負(fù)M鐨勬暣鏁板簭鍒楋紝鍓╀笅鐨勫氨鏄繘琛屾渶澶?/font>(N-P+1)嬈?/font>KMP鍖歸厤浜嗐?/font>





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楂樻柉娑堝厓http://www.shnenglu.com/menjitianya/archive/2014/06/08/207226.html鑻遍泟鍝噷鍑烘潵鑻遍泟鍝噷鍑烘潵Sun, 08 Jun 2014 11:55:00 GMThttp://www.shnenglu.com/menjitianya/archive/2014/06/08/207226.htmlhttp://www.shnenglu.com/menjitianya/comments/207226.htmlhttp://www.shnenglu.com/menjitianya/archive/2014/06/08/207226.html#Feedback2http://www.shnenglu.com/menjitianya/comments/commentRss/207226.htmlhttp://www.shnenglu.com/menjitianya/services/trackbacks/207226.html闃呰鍏ㄦ枃

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