{"id":338,"date":"2013-02-23T14:41:00","date_gmt":"2013-02-23T06:41:00","guid":{"rendered":"http:\/\/nike0good.jp1.rpvhost.net\/242"},"modified":"2013-02-23T14:41:00","modified_gmt":"2013-02-23T06:41:00","slug":"promoter_sequence_known_value_method_is_omitted_and_slip_a_solution","status":"publish","type":"post","link":"https:\/\/nike0good.com\/?p=338","title":{"rendered":"\u5b50\u5e8f\u5217(\u7701\u7565\u5df2\u77e5\u503c\u6cd5\u4e0e\u632a\u4f4d\u5f97\u89e3\u6cd5)"},"content":{"rendered":"<p>Problem 1 \u5b50\u5e8f\u5217(subsequence.pas\/c\/cpp)<\/p>\n<p>\u3010\u9898\u76ee\u63cf\u8ff0\u3011<\/p>\n<p>\u7ed9\u5b9a\u4e00\u4e2a\u957f\u5ea6\u4e3aN\uff08N\u4e3a\u5076\u6570\uff09\u7684\u5e8f\u5217\uff0c\u95ee\u80fd\u5426\u5c06\u5176\u5212\u5206\u4e3a\u4e24\u4e2a\u957f\u5ea6\u4e3aN\/2\u7684\u4e25&#26684;\u9012\u589e\u5b50\u5e8f\u5217\uff0c<\/p>\n<p>&nbsp;<\/p>\n<p>\u3010\u8f93\u5165&#26684;\u5f0f\u3011<\/p>\n<p>\u82e5\u5e72\u884c\uff0c\u6bcf\u884c\u8868\u793a\u4e00\u7ec4\u6570\u636e\u3002\u5bf9\u4e8e\u6bcf\u7ec4\u6570\u636e\uff0c\u9996\u5148\u8f93\u5165\u4e00\u4e2a\u6574\u6570N\uff0c\u8868\u793a\u5e8f\u5217\u7684\u957f\u5ea6\u3002\u4e4b\u540eN\u4e2a\u6574\u6570\u8868\u793a\u8fd9\u4e2a\u5e8f\u5217\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u3010\u8f93\u51fa&#26684;\u5f0f\u3011<\/p>\n<p>\u540c\u8f93\u5165\u884c\u6570\u3002\u5bf9\u4e8e\u6bcf\u7ec4\u6570\u636e\uff0c\u5982\u679c\u5b58\u5728\u4e00\u79cd\u5212\u5206\uff0c\u5219\u8f93\u51fa\u201cYes!\u201d\uff0c\u5426\u5219\u8f93\u51fa\u201cNo!\u201c\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>\u3010\u6837\u4f8b\u8f93\u5165\u3011<\/p>\n<p>6 3 1 4 5 8 7<\/p>\n<p>6 3 2 1 6 5 4<\/p>\n<p>\u3010\u6837\u4f8b\u8f93\u51fa\u3011<\/p>\n<p>Yes!<\/p>\n<p>No!<\/p>\n<p>\u3010\u6570\u636e\u8303\u56f4\u3011<\/p>\n<p>\u5171\u4e09\u7ec4\u6570\u636e\uff0c\u6bcf\u7ec4\u6570\u636e\u884c\u6570&lt;=50\uff0c0 &lt;= \u8f93\u5165\u7684\u6240\u6709\u6570 &lt;= 10^9<\/p>\n<p>\u7b2c\u4e00\u7ec4(30%)\uff1aN &lt;= 20<\/p>\n<p>\u7b2c\u4e8c\u7ec4(30%)\uff1aN &lt;= 100<\/p>\n<p>\u7b2c\u4e09\u7ec4(40%)\uff1aN &lt;= 2000<\/p>\n<p>\n<\/p>\n<p><span style=\"font-size:14px\">\u4e00\u822c\u9752\u5e74Dp\u65b9\u6848\uff1aF[i][j][k][l] \u8868\u793a\u524di&#43;j\u4f4d\u5206\u4e3a\u4e00\u4e2a\u957f\u5ea6\u4e3a<strong>i<\/strong>\u4ee5<strong>j<\/strong>\u7ed3\u5c3e\uff0c\u4e00\u4e2a\u957f\u5ea6\u4e3a<strong>k<\/strong>\u4ee5<strong>l<\/strong>\u7ed3\u5c3e\u7684\u5e8f\u5217<br \/>\n<strong>\u662f\u5426\u53ef\u884c(0,1)<\/strong><\/span><\/p>\n<p><span style=\"font-size:14px\">\u7701\u7565\u5df2\u77e5&#20540;\uff1a\u89c2\u5bdf\u53d1\u73b0<\/span><span style=\"font-size:14px\">j<\/span><span style=\"font-size:14px\">\u548c<\/span><span style=\"font-size:14px\">l<\/span><span style=\"font-size:14px\">\u4e2d\u81f3\u5c11\u6709\u4e00\u4e2a\u4e3a<\/span><span style=\"font-size:14px\">a[i&#43;j]<\/span><\/p>\n<p><span style=\"font-size:14px\">\u6545\u53ef\u7701\u7565\u5176\u4e2d\u4e00\u4f4d<\/span><\/p>\n<p>n=2000\u5fc5\u8dea<\/p>\n<p><span style=\"color:rgb(51,204,0)\"><span style=\"font-size:14px\">\u6587\u827a\u9752\u5e74Dp\u65b9\u6848\uff1a<\/span><\/span><\/p>\n<p><span style=\"color:rgb(51,204,0)\"><span style=\"font-size:14px\">\u632a\u4f4d\u5f97\u89e3\uff1a\u628af[i][j][k]\u4e2d\u7684k\u632a\u51fa\u6765&nbsp;<\/span><\/span><\/p>\n<p><span style=\"color:rgb(51,204,0)\"><span style=\"font-size:14px\"><span style=\"white-space:pre\"><\/span>\u539f\u56e0\uff1a\u663e\u7136i\u548cj\u4e0d\u53d8\u65f6\uff0c\u6211\u4eec\u5e0c\u671bk\u8d8a\u5c0f\u8d8a\u597d<\/span><\/span><\/p>\n<p><span style=\"color:rgb(51,204,0)\"><span style=\"font-size:14px\"><span style=\"white-space:pre\"><\/span>\u6240\u4ee5\u8bb0\u5f55min(k)\uff0c\u5e76\u8bb0\u5f55\u65e0\u89e3\u60c5\u51b5<\/span><\/span><\/p>\n<p><span style=\"color:rgb(51,204,0)\"><span style=\"font-size:14px\">O(n^2)<\/span><\/span><\/p>\n<p>\n<\/p>\n<p><pre name=\"code\" class=\"cpp\">#include&lt;cstdio&gt;\n#include&lt;iostream&gt;\n#include&lt;algorithm&gt;\n#include&lt;functional&gt;\n#include&lt;cstdlib&gt;\n#include&lt;cstring&gt;\n#include&lt;cmath&gt;\nusing namespace std;\n#define MAXN (2000+10)\n#define INF (2139062143)\nint n,a[MAXN],f[MAXN][MAXN];\nint main()\n{\n\tfreopen(&quot;subsequence.in&quot;,&quot;r&quot;,stdin);\n\tfreopen(&quot;subsequence.out&quot;,&quot;w&quot;,stdout);\n\twhile (scanf(&quot;%d&quot;,&amp;n)!=EOF)\n\t{\n\t\tmemset(f,127,sizeof(f));\n\t\tfor (int i=1;i&lt;=n;i++) scanf(&quot;%d&quot;,&amp;a[i]);\n\t\tf[1][1]=-1;\n\t\tfor (int i=1;i&lt;n;i++)\n\t\t{\n\t\t\tfor (int j=1;j&lt;=i;j++)\n\t\t\t{\n\t\t\t\tif (f[i][j]!=INF)\n\t\t\t\t{\n\t\t\t\t\tif (a[i]&lt;a[i+1]) f[i+1][j+1]=min(f[i+1][j+1],f[i][j]);\n\t\t\t\t\tif (f[i][j]&lt;a[i+1])\n\t\t\t\t\t\tf[i+1][i-j+1]=min(f[i+1][i-j+1],a[i]);\n\t\t\t\t}\n\t\t\t}\n\t\t}\n\t\t\/*\n\t\tfor (int i=0;i&lt;=n;i++)\n\t\t{\n\t\t\tfor (int j=0;j&lt;=n;j++)\n\t\t\t\tprintf(&quot;%d &quot;,f[i][j]);\n\t\t\tprintf(&quot;n&quot;);\n\t\t}\n\t\t*\/\n\t\tif (f[n][n&gt;&gt;1]!=INF) printf(&quot;Yes!n&quot;);\n\t\telse printf(&quot;No!n&quot;);\n\t}\n\treturn 0;\n}<\/pre><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Problem 1 \u5b50\u5e8f\u5217(subsequence.pas\/c\/cpp) \u3010\u9898\u76ee\u63cf\u8ff0\u3011 \u7ed9\u5b9a\u4e00\u4e2a\u957f\u5ea6\u4e3aN\uff08N\u4e3a [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_coblocks_attr":"","_coblocks_dimensions":"","_coblocks_responsive_height":"","_coblocks_accordion_ie_support":"","footnotes":""},"categories":[3],"tags":[30],"class_list":["post-338","post","type-post","status-publish","format-standard","hentry","category-defaultcategory","tag-dp"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>\u5b50\u5e8f\u5217(\u7701\u7565\u5df2\u77e5\u503c\u6cd5\u4e0e\u632a\u4f4d\u5f97\u89e3\u6cd5) - nike0good<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/nike0good.com\/?p=338\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" 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