{"id":62,"date":"2022-11-06T00:24:01","date_gmt":"2022-11-05T16:24:01","guid":{"rendered":"https:\/\/blog.myownweb.vip\/?p=62"},"modified":"2022-11-06T22:49:09","modified_gmt":"2022-11-06T14:49:09","slug":"binarysearch","status":"publish","type":"post","link":"https:\/\/forelink.top\/index.php\/2022\/11\/06\/binarysearch\/","title":{"rendered":"\u4e8c\u5206\u641c\u7d22\u4e0e\u4e8c\u5206\u7b54\u6848\uff08week2\uff09"},"content":{"rendered":"\n<p><strong>\u987a\u5e8f\u67e5\u627e<\/strong>\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO\uff08n\uff09\uff0c\u5728\u6570\u636e\u91cf\u4e3a1e8\u5de6\u53f3\u65f6\u8ba1\u7b97\u673a\u80fd\u57281s\u5185\u5904\u7406\u5b8c\u6bd5\uff0c\u4f46\u6570\u636e\u91cf\u4e3a1e9\u53ca\u4ee5\u4e0a\u7684\u65f6\u5019\uff0c\u4ecd\u91c7\u7528\u987a\u5e8f\u67e5\u627e\u5bf9\u4e8e\u8ba1\u7b97\u673a\u5c31\u6bd4\u8f83\u5403\u529b\u4e86\uff0c\u6548\u7387\u76f8\u5f53\u4f4e\u3002<\/p>\n\n\n\n<p class=\"has-medium-font-size\"><strong>\u4e8c\u5206\u67e5\u627e<\/strong>\u6709\u4e2a\u5f88\u91cd\u8981\u7684\u7279\u70b9\uff0c\u5c31\u662f<strong>\u4e0d\u4f1a\u67e5\u627e\u6570\u5217\u7684\u5168\u90e8\u5143\u7d20\uff0c\u800c\u67e5\u627e\u7684\u6570\u636e\u91cf\u5176\u5b9e\u6b63\u597d\u7b26\u5408\u5143\u7d20\u7684\u5bf9\u6570\uff0c\u6b63\u5e38\u60c5\u51b5\u4e0b\u6bcf\u6b21\u67e5\u627e\u7684\u5143\u7d20\u90fd\u5728\u4e00\u534a\u4e00\u534a\u5730\u51cf\u5c11<\/strong>\u3002\u5728\u6700\u574f\u7684\u60c5\u51b5\u548c\u4e00\u822c\u60c5\u51b5\u4e0b\u90fd\u6bd4<strong>\u987a\u5e8f\u67e5\u627e<\/strong>\u8981\u5feb\u3002<\/p>\n\n\n\n<p>\u4f7f\u7528\u4e8c\u5206\u67e5\u627e\u7684\u6761\u4ef6\uff1a<br>\u67e5\u627e\u7684\u5e8f\u5217<strong>\u5fc5\u987b<\/strong>\u8981\u662f<strong>\u5355\u8c03<\/strong>\u7684\u3002<\/p>\n\n\n\n<p>\uff08\u5047\u5982\u8003\u62c9\u732b\u642c\u7740\u521a\u501f\u76841e5\u672c\u4e66\u8d70\u51fa\u56fe\u4e66\u9986\uff0c\u4e24\u4fa7\u7684\u95e8\u7a81\u7136\u54cd\u4e86\uff08bushi\uff09<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">T1 \u4e8c\u5206\u67e5\u627e<\/h2>\n\n\n\n<p>Tag\uff1a\u57fa\u7840 \u4e8c\u5206\u67e5\u627e\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/forelink.top\/wp-content\/uploads\/2022\/11\/QQ\u56fe\u724720221105200932.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"955\" height=\"503\" data-original=\"https:\/\/forelink.top\/wp-content\/uploads\/2022\/11\/QQ\u56fe\u724720221105200932.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-63\"  sizes=\"auto, (max-width: 955px) 100vw, 955px\" \/><\/div><\/figure>\n\n\n\n<p>\uff08\u601d\u8def\u5462\uff09<br><strong>\u4ee3\u7801\u5982\u4e0b\u3002<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;iostream&gt;\nusing namespace std;\nint n,n_q;\nlong long int q;\nint main(){\n\tcin&gt;&gt;n&gt;&gt;n_q;\n\tlong long int num&#91;n+5];\n\tfor(int i=1;i&lt;=n;i++) cin&gt;&gt;num&#91;i];\/\/\u8f93\u5165\u6570\u636e\u3002\n\twhile(n_q--){\n\t\tcin&gt;&gt;q;\/\/\u8f93\u5165\u8be2\u95ee\u7684\u6570\u3002\n\t\tlong long int l=0,r=n+1,mid;\n\t\twhile(l+1!=r){\/\/\u5de6\u8fb9\u754c\u662f\u8be2\u95ee\u6570\u7684\u7f16\u53f7-1\n\t\t\tmid=(l+r)\/2;\/\/\u66f4\u65b0\u6570\u636e\u3002\n\t\t\tif(num&#91;mid]&gt;=q){\n\t\t\t\tr=mid;\n\t\t\t}\n\t\t\telse{\n\t\t\t\tl=mid;\n\t\t\t}\n\t\t}\/\/\u627e\u8fb9\u754c\u3002\n\t\tif(num&#91;l+1]==q){\n\t\t\t\tcout&lt;&lt;l+1&lt;&lt;' ';\n\t\t}\/\/\u5982\u679c\u627e\u5230\u4e86 \u8f93\u51fa\u5de6\u8fb9\u754c\u52a0\u4e00l+1\u3002\n\t\telse cout&lt;&lt;\"-1 \";\n\t\t\/\/\u627e\u4e0d\u5230 \u8f93\u51fa-1\u3002\n\t}\n\treturn 0;\n}<\/code><\/pre>\n\n\n\n<p>\u6709\u65f6\u5019\u4f1a\u9047\u5230 <strong>\u6700\u5927\u503c\u7684\u6700\u5c0f<\/strong> \u6216\u8005 <strong>\u6700\u5c0f\u503c\u7684\u6700\u5927<\/strong> \u95ee\u9898\uff0c\u76f4\u63a5\u53bb\u505a\u4e0d\u597d\u505a\uff0c\u4f46\u662f\u68c0\u67e5\u4e00\u4e2a\u7b54\u6848\u53ef\u4e0d\u53ef\u884c\u662f\u6bd4\u8f83\u7b80\u5355\u7684\u3002\u7136\u540e\u7528\u4e8c\u5206\u7684\u601d\u60f3 \u4e0d\u65ad\u7f29\u5c0f\u7b54\u6848\u7684\u533a\u95f4\uff0c\u6700\u540e\u83b7\u5f97\u53ef\u884c\u7b54\u6848\u7684\u6700\u5927\u503c\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-black-color has-alpha-channel-opacity has-black-background-color has-background is-style-wide\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">T2 \u8fdb\u51fb\u7684\u5976\u725b<\/h2>\n\n\n\n<p>tag\uff1a\u4e8c\u5206\u7b54\u6848 \u53ef\u884c\u6700\u5927\u503c\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/forelink.top\/wp-content\/uploads\/2022\/11\/ny.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"969\" height=\"559\" data-original=\"https:\/\/forelink.top\/wp-content\/uploads\/2022\/11\/ny.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-64\"  sizes=\"auto, (max-width: 969px) 100vw, 969px\" \/><\/div><\/figure>\n\n\n\n<p>\u7528\u4e8c\u5206\u7b54\u6848\u7684\u601d\u60f3\u53bb\u505a\uff0c\u9700\u8981\u5199\u68c0\u67e5\u51fd\u6570\u3002\u5bf9\u4e8e\u8fd9\u9053\u9898\uff0c\u8981\u5c06\u725b\u4ece\u5de6\u5230\u53f3\u8fdb\u884c\u5b89\u7f6e\uff0c\u76f4\u5230\u6240\u6709<strong>\u725b\u68da\u88ab\u5b89\u6392\u5b8c<\/strong>\u6216\u8005<strong>\u6240\u6709\u725b\u88ab\u5b89\u7f6e\u5b8c<\/strong>\u3002<\/p>\n\n\n\n<p><strong>\u4ee3\u7801\u5982\u4e0b\u3002<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;iostream&gt;\n#include &lt;algorithm&gt;\nusing namespace std;\nint N,C;\/\/N\u662f\u725b\u68da\u7684\u6570\u91cf\uff0cC\u662f\u725b\u7684\u6570\u91cf\u3002\nlong long int x&#91;100005];\/\/\u662f\u725b\u68da\u7684\u5750\u6807\u3002\nbool check(long long int ans){\/\/\u68c0\u67e5\u51fd\u6570\u5c06\u725b\u4ece\u5de6\u81f3\u53f3\u5b89\u7f6e\u3002\n\tlong long int start=x&#91;1],end,cow=C-1;\n\tfor(int i=2;i&lt;=N&amp;&amp;cow!=0;i++){\n\t\tend=x&#91;i];\n\t\t\/\/\u5982\u679c\u4e24\u4e2a\u725b\u68da\u95f4\u9694\u5927\u4e8e\u7b54\u6848\u7684\u503c,\u5b89\u7f6e\u597d\u4e86\u4e00\u5934\u725b\u3002\n\t\tif(end-start&gt;=ans){\n\t\t\tstart = end;\/\/\u66f4\u65b0\u5de6\u8fb9\u7684\u725b\u68da\u3002\n\t\t\tcow--;\/\/\u9700\u8981\u5b89\u7f6e\u7684\u725b-1\u3002\n\t\t}\n\t}\n\tif(cow&lt;=0) return true;\/\/\u5982\u679c\u6240\u6709\u7684\u725b\u90fd\u5b89\u7f6e\u597d\u4e86,\u8fd9\u4e2a\u7b54\u6848\u53ef\u884c\u3002\n\telse return false;\n}\nint main(){\n\tcin&gt;&gt;N&gt;&gt;C;\/\/\u8f93\u5165\u6570\u636e\u3002\n\tfor(int i=1;i&lt;=N;i++){\n\t\tcin&gt;&gt;x&#91;i];\n\t}\n\tsort(x+1,x+N+1);\/\/\u4e0d\u8981\u5fd8\u8bb0\u6392\u5e8f\u3002\n\t\/\/\u5f00\u59cb\u5199\u4e8c\u5206\u641c\u7d22\u7b54\u6848\u3002\n\tlong long int l=0,r=1e10+5,mid;\n\twhile(l&lt;=r){\n\t\tmid=(l+r)\/2;\n\t\t\/\/\u5982\u679c\u7b54\u6848\u53ef\u884c\uff0c\u628a\u5de6\u8fb9\u754c\u7684\u503c\u53f3\u79fb\u3002\n\t\tif(check(mid)){\n\t\t\tl=mid+1;\n\t\t}\n\t\telse\n\t\tr=mid-1;\n\t}\n\tcout&lt;&lt;l-1;\/\/\u8f93\u51fa\u7b54\u6848\u3002\n\treturn 0;\n}<\/code><\/pre>\n\n\n\n<p>\u5751\u70b9\u662f\u4e0d\u8981\u5fd8\u8bb0\u6392\u5e8f\uff0c\u8fd8\u6709\u68c0\u67e5\u51fd\u6570\u5faa\u73af\u7684\u7ed3\u675f\u6761\u4ef6\u3002<\/p>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-black-color has-alpha-channel-opacity has-black-background-color has-background is-style-wide\"\/>\n\n\n\n<p><\/p>\n\n\n\n<h2 class=\"wp-block-heading\">T3 \u4e00\u5143\u4e09\u6b21\u4eff\u9cbf\u6c42\u89e3\u3002<\/h2>\n\n\n\n<p>tag\uff1a\u4e8c\u5206\u7b54\u6848 \u7b80\u5355 \u679a\u4e3e\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/forelink.top\/wp-content\/uploads\/2022\/11\/yysc.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"979\" height=\"505\" data-original=\"https:\/\/forelink.top\/wp-content\/uploads\/2022\/11\/yysc.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-65\"  sizes=\"auto, (max-width: 979px) 100vw, 979px\" \/><\/div><\/figure>\n\n\n\n<p>\u8fd9\u9898\u6ce8\u610f\u5230\u6839\u7684\u8303\u56f4\u6bd4\u8f83\u5c0f\uff0c\u4e14\u6839\u4e8e\u6839\u4e4b\u5dee\u7684\u7edd\u5bf9\u503c\u5927\u4e8e\u7b49\u4e8e1\uff0c\u6240\u4ee5\u53ef\u4ee5<strong>\u679a\u4e3e\u4e24\u767e\u4e2a\u70b9\u627e\u6839<\/strong>\u3002<br>\u6d3b\u7528\u9898\u9762\u4e0e\u63d0\u793a\uff0c\u627e\u591f\u4e09\u4e2a\u70b9\u540e\u9000\u51fa\u5faa\u73af\uff0c\u7136\u540e\u8f93\u51fa\u7b54\u6848\u3002<\/p>\n\n\n\n<p>\u83b7\u5f97\u7cbe\u786e\u5230\u5c0f\u6570\u70b9\u540e\u4e24\u4f4d\u7684\u7b54\u6848\uff0c\u6709\u4e24\u79cd\u65b9\u6cd5<br>\u2460\u4e00\u79cd\u662fL,R\u4f5c\u5dee\u7684\u503c<strong>\u7cbe\u786e\u52300.001\u65f6<\/strong>\u8fd4\u56de\u7b54\u6848\u3002<br>\u2461\u4e00\u79cd\u662f<strong>\u9650\u5b9a\u6b21\u6570\u7684\u6d6e\u70b9\u4e8c\u5206<\/strong>\u3002<strong>\uff08\u673a\u5b9dhso\uff09<\/strong><\/p>\n\n\n\n<p>\u4ee3\u7801\u5982\u4e0b\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;iostream&gt;\n#include &lt;cmath&gt;\nusing namespace std;\ndouble a,b,c,d;\ndouble temp;\ndouble ans&#91;4];\/\/\u8bb0\u5f55\u7b54\u6848\u7684\u6570\u7ec4\uff08\u5176\u5b9e\u53ef\u4ee5\u4e0d\u8981\uff09\nint cnt=1;\ndouble f(double x){\n\treturn (a*pow(x,3)+b*pow(x,2)+c*x+d);\n}\/\/\u8ba1\u7b97\u51fd\u6570\u503c\u7684\u51fd\u6570\u3002\nbool root(double l,double r){\n\tif(f(l)*f(r)&lt;0) return true;\n\telse return false;\n}\/\/\u975e\u5e38\u7b80\u5355\u7684\u68c0\u67e5\u51fd\u6570\u3002\nint main(){\n\tcin&gt;&gt;a&gt;&gt;b&gt;&gt;c&gt;&gt;d;\n\tfor(int i=-100;i&lt;100;i++){\/\/\u679a\u4e3e200\u4e2a\u70b9\u3002\n\t\tif(cnt==4) break;\/\/\u5b58\u591f\u7b54\u6848\u5c31\u53ef\u4ee5\u4e86\u3002\n\t\tif(f(i)==0){\n\t\t\tans&#91;cnt++]=i;\n\t\t\tcontinue;\n\t\t}\n\t\tif(root(i,i+1)){\/\/\u521d\u6b65\u5224\u65ad\u6709\u6ca1\u6709\u6839\u3002\n\t\t\tdouble l=i,r=i+1,mid;\n\t\t\tint tot=1;\/\/\u8ba1\u6570\u5668\u3002\n\t\t\twhile(++tot&lt;60){\/\/\u9650\u5b9a\u6b21\u6570\u7684\u6d6e\u70b9\u4e8c\u5206\u3002\n\t\t\t\tmid = (l+r)\/2;\n\t\t\t\tif(root(l,mid)){\n\t\t\t\t\tr=mid;\n\t\t\t\t}\n\t\t\t\telse l=mid;\n\t\t\t\ttemp=mid;\n\t\t\t}\n\t\t\tans&#91;cnt++]=temp;\n\t\t}\n\t}\n\tprintf(\"%.2f %.2f %.2f\",ans&#91;1],ans&#91;2],ans&#91;3]);\n\treturn 0;\n}<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-black-color has-alpha-channel-opacity has-black-background-color has-background is-style-wide\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">T4 \u952f\u6811<\/h2>\n\n\n\n<p>tag\uff1a\u4e8c\u5206\u7b54\u6848 \u53ef\u884c\u6700\u5927\u503c<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/forelink.top\/wp-content\/uploads\/2022\/11\/ks.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"964\" height=\"719\" data-original=\"https:\/\/forelink.top\/wp-content\/uploads\/2022\/11\/ks.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-71\"  sizes=\"auto, (max-width: 964px) 100vw, 964px\" \/><\/div><\/figure>\n\n\n\n<p><strong>\u4ee3\u7801\u5982\u4e0b\u3002<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;iostream>\r\nusing namespace std;\r\nconst int N=1e6+5;\r\nint n;\/\/n\u4e3a\u6811\u6728\u7684\u6570\u91cf\u3002\r\nlong long int tree&#91;N],need;\/\/\u6570\u7684\u9ad8\u5ea6 \u548c \u9700\u8981\u7684\u6728\u5934\u957f\u5ea6\u3002\r\nbool check(long long int x){\r\n\tlong long int sum=0;\/\/\u780d\u4e0b\u7684\u6728\u6750\u957f\u5ea6\u8ba1\u6570\u3002\r\n\tfor(int i=1;i&lt;=n;i++)\r\n\tif(x&lt;tree&#91;i]){\/\/\u5982\u679c\u6728\u5934\u80fd\u952f\u5230\u6811\u3002\r\n\t\tsum+=tree&#91;i]-x;\/\/\u957f\u5ea6-\u952f\u5b50\u9ad8\u5ea6\u3002\r\n\t}\r\n\tif(sum>=need) return true;\/\/\u5982\u679c\u952f\u591f\u4e86\u3002\r\n\treturn false;\r\n}\r\nint main(){\r\n\tcin>>n>>need;\r\n\tfor(int i=1;i&lt;=n;i++){\r\n\t\tcin>>tree&#91;i];\r\n\t}\/\/\u8f93\u5165\u6570\u636e\u3002\r\n\tlong long int l=0,r=2e9+5,mid;\r\n\t\/\/\u8981\u6c42\u952f\u6700\u5c11\u7684\u6811\u6ee1\u8db3\u6761\u4ef6\u3002\uff08\u5373\u6c42\u6ee1\u8db3\u6761\u4ef6\u7684\u6700\u5927\u503c\u3002\r\n\twhile(l&lt;=r){\r\n\t\tmid=(l+r)\/2;\r\n\t\tif(check(mid)){\/\/\u5982\u679c\u7b54\u6848\u53ef\u884c,\u627e\u66f4\u9ad8\u7684\u503c\u3002\r\n\t\t\tl=mid+1;\r\n\t\t}\r\n\t\telse r=mid-1;\r\n\t}\r\n\tcout&lt;&lt;l-1;\r\n\treturn 0;\r\n}<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-black-color has-alpha-channel-opacity has-black-background-color has-background is-style-wide\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">T5 \u8df3\u77f3\u5934<\/h2>\n\n\n\n<p>tag\uff1a\u4e8c\u5206\u7b54\u6848 \u8fb9\u754c\u6700\u5927\u503c\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/forelink.top\/wp-content\/uploads\/2022\/11\/QQ\u56fe\u724720221106221545.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"982\" height=\"722\" data-original=\"https:\/\/forelink.top\/wp-content\/uploads\/2022\/11\/QQ\u56fe\u724720221106221545.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-70\"  sizes=\"auto, (max-width: 982px) 100vw, 982px\" \/><\/div><\/figure>\n\n\n\n<p>\u5751\u70b9\uff1a\u6709\u53ef\u80fd\u8981\u628a\u7b2c\u4e00\u9897\u6216\u8005\u6700\u540e\u4e00\u9897\u77f3\u5934\u79fb\u8d70\u7684\u60c5\u51b5\uff0c\u6240\u4ee5\u8d77\u70b9\u8981\u8bbe\u7f6e\u62100\uff0c\u7136\u540e\u8981\u628a\u7ec8\u70b9\u5b58\u5165rock\u6570\u7ec4\u4e2d\uff0c\u8fd9\u6837\u624d\u80fd\u5bf9\u6700\u540e\u4e00\u9897\u77f3\u5934\u8fdb\u884c\u5224\u5b9a\u3002<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;iostream>\r\nusing namespace std;\r\nconst int N=5e5+5;\r\nint l,n,m;\/\/ l\u662f\u957f\u5ea6\uff0cn\u662f\u5ca9\u77f3\u4e2a\u6570\uff0cm\u662f\u53ef\u79fb\u8d70\u7684\u77f3\u5934\u6570\u3002\r\nint rock&#91;N];\/\/\u8bb0\u5f55\u77f3\u5934 \u8ddd\u79bb\u8d77\u70b9\u7684 \u957f\u5ea6\u3002\r\nbool check(int x){\r\n\tint cnt=0,start=0,end;\r\n\tfor(int i=1;i&lt;=n+1;i++){\r\n\t\tend=rock&#91;i];\/\/\u66f4\u65b0\u4e0b\u4e00\u4e2a\u77f3\u5934\u7684\u503c\u3002\r\n\t\tif(end-start&lt;x){\/\/\u5982\u679c\u4e24\u4e2a\u77f3\u5934\u8ddd\u79bb\u5c0f\u4e8e\u68c0\u67e5\u7684\u8ddd\u79bb\u3002\r\n\t\t\tcnt++;\/\/\u8bf4\u660e\u8981\u79fb\u8d70\u4e00\u4e2a\u77f3\u5934\u3002\r\n\t\t}\r\n\t\telse \/\/\u5426\u5219\u66f4\u65b0\u4e0a\u4e00\u4e2a\u77f3\u5934\u7684\u503c\u3002\r\n\t\tstart=end;\r\n\t}\r\n\tif(cnt&lt;=m) return true;\r\n\treturn false;\r\n}\r\nint main(){\r\n\tcin>>l>>n>>m;\r\n\tfor(int i=1;i&lt;=n;i++)\r\n\tcin>>rock&#91;i];\r\n\trock&#91;n+1]=l;\/\/\u5751\u70b9 \u6700\u540e\u4e00\u4e2a\u77f3\u5934\u4e5f\u8981\u8fdb\u884c\u5224\u65ad\u3002\r\n\t\/\/\u6240\u4ee5\u8981\u628a\u4ed6\u5b58\u5165rock\u6570\u7ec4\u91cc\u3002\r\n\tint l=0,r=1e9+5,mid;\/\/\u4e8c\u5206\u3002\r\n\twhile(l&lt;=r){\r\n\t\tmid=(l+r)\/2;\r\n\t\tif(check(mid)){\/\/\u5982\u679c\u7b54\u6848\u53ef\u884c\u3002\r\n\t\t\tl=mid+1;\/\/\u66f4\u65b0\u5de6\u8fb9\u754c\u7684\u503c\u3002\r\n\t\t}\r\n\t\telse r=mid-1;\/\/\u4e0d\u53ef\u884c\u66f4\u65b0\u53f3\u8fb9\u754c\u7684\u503c\u3002\r\n\t}\r\n\tcout&lt;&lt;r;\/\/\u8f93\u51far\u3002\r\n\treturn 0;\r\n}<\/code><\/pre>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-black-color has-alpha-channel-opacity has-black-background-color has-background is-style-wide\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">T6 \u4e09\u5206\u6cd5\u3002<\/h2>\n\n\n\n<p>tag\uff1a\u4e09\u5206\u6a21\u677f\u3002<\/p>\n\n\n\n<p>\u8fd9\u9053\u9898\u542c\u8bf4\u662f\u5178\u578b\u7684\u4e09\u5206\u6a21\u677f\uff0c\u7528\u5c0f\u5b66\u601d\u7ef4\u6c42\u5bfc\u4e8c\u5206\u4e5f\u884c\uff0c\u4f46\u5bf9\u4e8e\u4e00\u4e9b\u590d\u6742\u51fd\u6570\u6c42\u5bfc\u5e76\u4e0d\u662f\u90a3\u4e48\u7684\u65b9\u4fbf\u3002<\/p>\n\n\n\n<p>\u8fd9\u9053\u9898\u7684\u601d\u8def\u662f\uff1a\u5728[L\uff0cR]\u4e0a\u53d6\u4e24\u4e2a\u4e09\u7b49\u5206\u70b9\u8bb0\u4e3a x=i \u548c x=j \uff0c\u80af\u5b9a\u662ff\uff08x\uff09\u66f4\u5927\u7684\u7684\u6570\u66f4\u9760\u8fd1\u62d0\u70b9\u3002<br>\u6240\u4ee5\u4e3a\u4e86\u8ba9\u8303\u56f4\u66f4\u63a5\u8fd1\u62d0\u70b9\uff0c\u53ef\u4ee5\u8ba9\u6ca1\u90a3\u4e48\u63a5\u8fd1\u7684\u90a3\u4e2a\u70b9\u4e3a\u65b0\u7684\u8fb9\u754c\uff0c\u4e0d\u65ad\u7f29\u5c0f\u8303\u56f4\u76f4\u5230\u6ee1\u8db3\u7cbe\u786e\u5ea6<br>\u7684\u6761\u4ef6\u3002<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><div class='fancybox-wrapper lazyload-container-unload' data-fancybox='post-images' href='https:\/\/forelink.top\/wp-content\/uploads\/2022\/11\/sfs.png'><img class=\"lazyload lazyload-style-1\" src=\"data:image\/svg+xml;base64,PCEtLUFyZ29uTG9hZGluZy0tPgo8c3ZnIHdpZHRoPSIxIiBoZWlnaHQ9IjEiIHhtbG5zPSJodHRwOi8vd3d3LnczLm9yZy8yMDAwL3N2ZyIgc3Ryb2tlPSIjZmZmZmZmMDAiPjxnPjwvZz4KPC9zdmc+\"  loading=\"lazy\" decoding=\"async\" width=\"972\" height=\"473\" data-original=\"https:\/\/forelink.top\/wp-content\/uploads\/2022\/11\/sfs.png\" src=\"data:image\/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAEAAAABCAYAAAAfFcSJAAAAAXNSR0IArs4c6QAAAARnQU1BAACxjwv8YQUAAAAJcEhZcwAADsQAAA7EAZUrDhsAAAANSURBVBhXYzh8+PB\/AAffA0nNPuCLAAAAAElFTkSuQmCC\" alt=\"\" class=\"wp-image-72\"  sizes=\"auto, (max-width: 972px) 100vw, 972px\" \/><\/div><\/figure>\n\n\n\n<p><strong>\u5751\u70b9\uff1a\u4e09\u7b49\u5206\u70b9\u4e0d\u662f\uff08l+r\uff09*\uff081\/3\uff09\u545c\u545c\u3002<\/strong><\/p>\n\n\n\n<p><strong>\u4ee3\u7801\u5982\u4e0b\u3002<\/strong><\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>#include &lt;iostream>\r\n#include &lt;cmath>\/\/\u9700\u8981\u7528\u5230\u6307\u6570\u8fd0\u7b97\u3002\r\nusing namespace std;\r\nint n;\/\/\u51fd\u6570\u6709n+1\u9879\u3002\r\ndouble l,r,ll,rr,cut;\/\/ll\uff0crr\u4e3a\u5de6\u53f3\u4e09\u7b49\u5206\u70b9\r\n\/\/cut\u4e3a&#91;L,R]\u4e09\u7b49\u5206\u540e\u6bcf\u4e00\u6bb5\u7684\u957f\u5ea6\u3002\r\n\/\/\u51fd\u6570\u6b21\u6570\u4e3a6\u523013\uff0c\u6240\u4ee5\u5b9a\u4e49\u4e00\u4e2a\u6570\u7ec4\u5b58\u5404\u9879\u7cfb\u6570\u3002\r\ndouble a&#91;20];\r\n\/\/\u8ba1\u7b97\u5e76\u8fd4\u56de\u51fd\u6570\u503c\u7684\u51fd\u6570\u3002\r\ndouble f(double x){\r\n\tdouble sum=0;\r\n\tfor(int i=0;i&lt;=n;i++)\r\n\tsum+=a&#91;i]*pow(x,i);\r\n\treturn sum;\r\n}\r\nint main(){\r\n\tcin>>n>>l>>r;\r\n\t\/\/\u6ce8\u610f\u662f\u4ece\u6b21\u6570\u5927\u7684\u7cfb\u6570\u5f00\u59cb\u8f93\u5165\u3002\r\n\tfor(int i=n;i>=0;i--) cin>>a&#91;i];\r\n\twhile(abs(l-r)>0.00001){\r\n\t\tcut = (r-l)\/3.0;\r\n\t\tll=l+cut;\/\/\u52a0\u4e09\u5206\u4e4b\u4e00\u957f\u5ea6\u3002\r\n\t\trr=r-cut;\/\/\u51cf\u4e09\u5206\u4e4b\u4e00\u957f\u5ea6\u3002\r\n\t\tif(f(ll)>=f(rr))\/\/\u5982\u679c\u5de6\u8fb9\u7684\u70b9\u66f4\u9760\u8fd1\u3002\r\n\t\t\tr=rr;\/\/\u66f4\u65b0\u53f3\u8fb9\u754c\u3002\r\n\t\telse l=ll;\/\/\u5426\u5219\u66f4\u65b0\u5de6\u8fb9\u754c\u3002\r\n\t}\r\n\tprintf(\"%.5lf\",(l+r)\/2.0);\r\n\treturn 0;\r\n}<\/code><\/pre>\n\n\n\n<p><strong>\u5927\u6982\u5c31\u662f\u8fd9\u6837\uff1f<\/strong><br><strong>\u597d\u96be\u54e6\u3002<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-text-color has-black-color has-alpha-channel-opacity has-black-background-color has-background is-style-wide\"\/>\n\n\n\n<h2 class=\"wp-block-heading\">\u5b58\u5728\u7684\u95ee\u9898\uff1a<\/h2>\n\n\n\n<p>\u2460\u4e8c\u5206\u7b54\u6848\u7684<strong>\u9898\u5199\u5c11\u4e86<\/strong>\uff0c<strong>\u68c0\u67e5\u51fd\u6570<\/strong>\u5199\u7684<strong>\u5f88\u6162<\/strong>\u3002<br>\u2461\u5176\u5b9e\u5bf9\u7b54\u6848\u8be5\u600e\u4e48\u4fdd\u5b58\u8fd8\u662f\u4e0d\u592a\u719f\u6089\u7684\uff08\u57fa\u672c\u90fd\u662f\u5728\u8c03\u8bd5\u7684\u65f6\u5019\u76f4\u63a5\u8f93\u51fa\u8fb9\u754c\u9644\u8fd1\u7684\u6570\uff09<\/p>\n\n\n\n<p>\u597d\u7d2f\u554a\u6211\u8981\u73a9\u4e1c\u65b9\u53bb\u4e86\uff08\u6446\u3002<\/p>\n\n\n<ul class=\"wp-block-archives-list wp-block-archives\">\t<li><a href='https:\/\/forelink.top\/index.php\/2026\/04\/'>2026 \u5e74 4 \u6708<\/a><\/li>\n\t<li><a href='https:\/\/forelink.top\/index.php\/2026\/03\/'>2026 \u5e74 3 \u6708<\/a><\/li>\n\t<li><a href='https:\/\/forelink.top\/index.php\/2026\/02\/'>2026 \u5e74 2 \u6708<\/a><\/li>\n\t<li><a href='https:\/\/forelink.top\/index.php\/2025\/08\/'>2025 \u5e74 8 \u6708<\/a><\/li>\n\t<li><a href='https:\/\/forelink.top\/index.php\/2025\/05\/'>2025 \u5e74 5 \u6708<\/a><\/li>\n\t<li><a href='https:\/\/forelink.top\/index.php\/2024\/10\/'>2024 \u5e74 10 \u6708<\/a><\/li>\n\t<li><a href='https:\/\/forelink.top\/index.php\/2024\/09\/'>2024 \u5e74 9 \u6708<\/a><\/li>\n\t<li><a href='https:\/\/forelink.top\/index.php\/2024\/08\/'>2024 \u5e74 8 \u6708<\/a><\/li>\n\t<li><a href='https:\/\/forelink.top\/index.php\/2024\/07\/'>2024 \u5e74 7 \u6708<\/a><\/li>\n\t<li><a href='https:\/\/forelink.top\/index.php\/2024\/06\/'>2024 \u5e74 6 \u6708<\/a><\/li>\n\t<li><a href='https:\/\/forelink.top\/index.php\/2024\/05\/'>2024 \u5e74 5 \u6708<\/a><\/li>\n\t<li><a href='https:\/\/forelink.top\/index.php\/2024\/04\/'>2024 \u5e74 4 \u6708<\/a><\/li>\n\t<li><a href='https:\/\/forelink.top\/index.php\/2024\/02\/'>2024 \u5e74 2 \u6708<\/a><\/li>\n\t<li><a href='https:\/\/forelink.top\/index.php\/2024\/01\/'>2024 \u5e74 1 \u6708<\/a><\/li>\n\t<li><a href='https:\/\/forelink.top\/index.php\/2023\/11\/'>2023 \u5e74 11 \u6708<\/a><\/li>\n\t<li><a href='https:\/\/forelink.top\/index.php\/2023\/10\/'>2023 \u5e74 10 \u6708<\/a><\/li>\n\t<li><a href='https:\/\/forelink.top\/index.php\/2023\/05\/'>2023 \u5e74 5 \u6708<\/a><\/li>\n\t<li><a href='https:\/\/forelink.top\/index.php\/2022\/12\/'>2022 \u5e74 12 \u6708<\/a><\/li>\n\t<li><a href='https:\/\/forelink.top\/index.php\/2022\/11\/'>2022 \u5e74 11 \u6708<\/a><\/li>\n\t<li><a href='https:\/\/forelink.top\/index.php\/2022\/10\/'>2022 \u5e74 10 \u6708<\/a><\/li>\n<\/ul>","protected":false},"excerpt":{"rendered":"<p>\u987a\u5e8f\u67e5\u627e\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO\uff08n\uff09\uff0c\u5728\u6570\u636e\u91cf\u4e3a1e8\u5de6\u53f3\u65f6\u8ba1\u7b97\u673a\u80fd\u57281s\u5185\u5904\u7406\u5b8c\u6bd5\uff0c\u4f46\u6570\u636e\u91cf\u4e3a1e9\u53ca\u4ee5\u4e0a\u7684\u65f6\u5019\uff0c\u4ecd 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