{"id":106,"date":"2018-09-27T08:46:00","date_gmt":"2018-09-27T00:46:00","guid":{"rendered":"https:\/\/www.wangliguang.cn\/?p=106"},"modified":"2025-08-05T09:57:44","modified_gmt":"2025-08-05T01:57:44","slug":"hdu1262%ef%bc%9a%e5%af%bb%e6%89%be%e7%b4%a0%e6%95%b0%e5%af%b9","status":"publish","type":"post","link":"https:\/\/wangliguang.cn\/?p=106","title":{"rendered":"HDU1262\uff1a\u5bfb\u627e\u7d20\u6570\u5bf9"},"content":{"rendered":"<p>\u54e5\u5fb7\u5df4\u8d6b\u731c\u60f3\u5927\u5bb6\u90fd\u77e5\u9053\u4e00\u70b9\u5427.\u6211\u4eec\u73b0\u5728\u4e0d\u662f\u60f3\u8bc1\u660e\u8fd9\u4e2a\u7ed3\u8bba,\u800c\u662f\u60f3\u5728\u7a0b\u5e8f\u8bed\u8a00\u5185\u90e8\u80fd\u591f\u8868\u793a\u7684\u6570\u96c6\u4e2d,\u4efb\u610f\u53d6\u51fa\u4e00\u4e2a\u5076\u6570,\u6765\u5bfb\u627e\u4e24\u4e2a\u7d20\u6570,\u4f7f\u5f97\u5176\u548c\u7b49\u4e8e\u8be5\u5076\u6570. <br \/>\n  \u505a\u597d\u4e86\u8fd9\u4ef6\u5b9e\u4e8b,\u5c31\u80fd\u8bf4\u660e\u8fd9\u4e2a\u731c\u60f3\u662f\u6210\u7acb\u7684. <br \/>\n  \u7531\u4e8e\u53ef\u4ee5\u6709\u4e0d\u540c\u7684\u7d20\u6570\u5bf9\u6765\u8868\u793a\u540c\u4e00\u4e2a\u5076\u6570,\u6240\u4ee5\u4e13\u95e8\u8981\u6c42\u6240\u5bfb\u627e\u7684\u7d20\u6570\u5bf9\u662f\u4e24\u4e2a\u503c\u6700\u76f8\u8fd1\u7684.\n<\/p><\/blockquote>\n<p>Input<\/p>\n<blockquote><p>\n  \u8f93\u5165\u4e2d\u662f\u4e00\u4e9b\u5076\u6574\u6570 M(\u5927\u4e8e5\u5c0f\u4e8e\u7b49\u4e8e10000\uff09\n<\/p><\/blockquote>\n<p>Output<\/p>\n<blockquote><p>\n  \u5bf9\u4e8e\u6bcf\u4e2a\u5076\u6570,\u8f93\u51fa\u4e24\u4e2a\u5f7c\u6b64\u6700\u63a5\u8fd1\u7684\u7d20\u6570,\u5176\u548c\u7b49\u4e8e\u8be5\u5076\u6570.\n<\/p><\/blockquote>\n<p>Sample Input<\/p>\n<blockquote><p>\n  20 30 40\n<\/p><\/blockquote>\n<p>Sample Output<\/p>\n<blockquote><p>\n  7 13 <br \/>\n  13 17 <br \/>\n  17 23\n<\/p><\/blockquote>\n<p>\u4ee3\u7801\u4e0e\u89e3\u91ca\uff1a<\/p>\n<pre class=\"prettyprint\"><code class=\"language-C++ hljs cpp\"><span class=\"hljs-preprocessor\">#include<iostream><\/span>\n<span class=\"hljs-preprocessor\">#include<cstdio><\/span>\n<span class=\"hljs-keyword\">using<\/span> <span class=\"hljs-keyword\">namespace<\/span> <span class=\"hljs-built_in\">std<\/span>;\n<span class=\"hljs-keyword\">int<\/span> p[<span class=\"hljs-number\">10000<\/span>] = {<span class=\"hljs-number\">0<\/span>};\n<span class=\"hljs-keyword\">int<\/span> tag[<span class=\"hljs-number\">10000<\/span>] = {<span class=\"hljs-number\">0<\/span>};\n<span class=\"hljs-keyword\">void<\/span> FindPrime(<span class=\"hljs-keyword\">int<\/span> a){\n     <span class=\"hljs-keyword\">int<\/span> cnt = <span class=\"hljs-number\">0<\/span>,i;\n    <span class=\"hljs-keyword\">for<\/span> (<span class=\"hljs-keyword\">int<\/span> i = <span class=\"hljs-number\">2<\/span>; i < a; i++)\n     {\n        <span class=\"hljs-keyword\">if<\/span> (!tag[i])       <span class=\"hljs-comment\">\/\/tag\u662f\u6807\u8bb0\u6570\u7ec4\uff0c\u521d\u59cb\u5316\u4e3a0      <\/span>\n              p[cnt++] = i;    <span class=\"hljs-comment\">\/\/\u5c06\u6570i\u52a0\u5165\u7d20\u6570\u6570\u7ec4<\/span>\n        <span class=\"hljs-keyword\">for<\/span> (<span class=\"hljs-keyword\">int<\/span> j = <span class=\"hljs-number\">0<\/span>; j < cnt && p[j] * i < a; j++)\n         {\n             tag[i*p[j]] = <span class=\"hljs-number\">1<\/span>;\n            <span class=\"hljs-keyword\">if<\/span> (i % p[j] == <span class=\"hljs-number\">0<\/span>)\n             <span class=\"hljs-keyword\">break<\/span>;\n         }\n    }\n}\n<span class=\"hljs-keyword\">void<\/span> FindResult(<span class=\"hljs-keyword\">int<\/span> a){\n    <span class=\"hljs-keyword\">int<\/span> i,j,num = <span class=\"hljs-number\">0<\/span>,flag = <span class=\"hljs-number\">0<\/span>,num1,num2;\n    <span class=\"hljs-keyword\">for<\/span>(i = <span class=\"hljs-number\">0<\/span>; i < <span class=\"hljs-number\">10000<\/span>; i++){\n        <span class=\"hljs-keyword\">if<\/span>(p[i]){\n            num++;\n        }\n    }\n    <span class=\"hljs-keyword\">for<\/span>(i = <span class=\"hljs-number\">0<\/span>; i < num; i++){\n        <span class=\"hljs-keyword\">for<\/span>(j = i; j < num; j++){\n            <span class=\"hljs-keyword\">if<\/span>((p[i] + p[j]) == a){\n                <span class=\"hljs-keyword\">if<\/span>(flag){\n                    <span class=\"hljs-keyword\">if<\/span>(p[i] > num1){\n                        num1 = p[i];\n                    }\n                    <span class=\"hljs-keyword\">if<\/span>(p[j] < num2){\n                        num2 = p[j];\n                    }\n                }\n                <span class=\"hljs-keyword\">else<\/span>\n                {\n                    num1 = p[i];\n                    num2 = p[j];\n                    flag = <span class=\"hljs-number\">1<\/span>;\n                }\n            }\n        }\n    }\n    <span class=\"hljs-built_in\">cout<\/span> << num1 << <span class=\"hljs-string\">\" \"<\/span> << num2 << endl;\n}\n<span class=\"hljs-keyword\">int<\/span> main(){\n    <span class=\"hljs-keyword\">int<\/span> m;\n    <span class=\"hljs-keyword\">while<\/span>(<span class=\"hljs-built_in\">cin<\/span> >> m){\n        FindPrime(m);\n        <span class=\"hljs-comment\">\/*for(int i=0;p[i]!=0;i++){\n            cout << p[i] << \"  \";\n        }*\/<\/span>\n        FindResult(m);\n    }\n    <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-number\">0<\/span>;\n}<\/code><\/pre>\n<p>\u4ee5\u4e0a\u4ee3\u7801\u7ecfVjudge\u5224\u5b9a\u901a\u8fc7<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u54e5\u5fb7\u5df4\u8d6b\u731c\u60f3\u5927\u5bb6\u90fd\u77e5\u9053\u4e00\u70b9\u5427.\u6211\u4eec\u73b0\u5728\u4e0d\u662f\u60f3\u8bc1\u660e\u8fd9\u4e2a\u7ed3\u8bba,\u800c\u662f\u60f3\u5728\u7a0b\u5e8f\u8bed\u8a00\u5185\u90e8\u80fd\u591f\u8868\u793a\u7684\u6570\u96c6\u4e2d,\u4efb\u610f\u53d6\u51fa\u4e00\u4e2a\u5076&hellip; <a href=\"https:\/\/wangliguang.cn\/?p=106\" class=\"more-link\">\u7ee7\u7eed\u9605\u8bfb <span class=\"screen-reader-text\">HDU1262\uff1a\u5bfb\u627e\u7d20\u6570\u5bf9<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22],"tags":[44],"class_list":["post-106","post","type-post","status-publish","format-standard","hentry","category-22","tag-44"],"_links":{"self":[{"href":"https:\/\/wangliguang.cn\/index.php?rest_route=\/wp\/v2\/posts\/106","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/wangliguang.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/wangliguang.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/wangliguang.cn\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/wangliguang.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=106"}],"version-history":[{"count":1,"href":"https:\/\/wangliguang.cn\/index.php?rest_route=\/wp\/v2\/posts\/106\/revisions"}],"predecessor-version":[{"id":681,"href":"https:\/\/wangliguang.cn\/index.php?rest_route=\/wp\/v2\/posts\/106\/revisions\/681"}],"wp:attachment":[{"href":"https:\/\/wangliguang.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=106"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/wangliguang.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=106"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/wangliguang.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=106"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}