{"id":81,"date":"2023-11-05T22:51:00","date_gmt":"2023-11-05T14:51:00","guid":{"rendered":"http:\/\/www.cmd137blog.top\/?p=81"},"modified":"2024-03-31T22:53:35","modified_gmt":"2024-03-31T14:53:35","slug":"%e3%80%90bjfu%e3%80%91%e7%a8%8b%e5%ba%8f%e8%ae%be%e8%ae%a1%e5%9f%ba%e7%a1%80-%e5%ae%9e%e9%aa%8c1","status":"publish","type":"post","link":"http:\/\/www.cmd137blog.top\/?p=81","title":{"rendered":"\u3010BJFU\u3011\u7a0b\u5e8f\u8bbe\u8ba1\u57fa\u7840 \u5b9e\u9a8c1"},"content":{"rendered":"\n<h1 class=\"wp-block-heading\">\u4e00\u3001\u9898\u76ee\uff1a<\/h1>\n\n\n\n<p>\u5b9e\u9a8c\u5185\u5bb9\uff1a<br>1.\u7f16\u5199\u7a0b\u5e8f\uff0c\u5b9e\u73b0\u5982\u4e0b\u529f\u80fd\uff1a\u6c42\u4e4b\u503c\u3002<br>\u601d\u8003\uff1a\u6ce8\u610f\u5206\u6570\u4e4b\u524d\u7684\u7b26\u53f7\uff0c\u4ec0\u4e48\u65f6\u5019\u4e3a\u6b63\u4ec0\u4e48\u65f6\u5019\u4e3a\u8d1f\uff1f<\/p>\n\n\n\n<ol class=\"wp-block-list\" start=\"2\">\n<li>\u7f16\u5199\u7a0b\u5e8f\uff0c\u5b9e\u73b0\u5982\u4e0b\u529f\u80fd\uff1a\u6c42\u51fa 200 \u5230 300 \u4e4b\u95f4\u7684\u6570\uff0c\u4e14\u6ee1\u8db3\u6761\u4ef6\uff1a\u5b83\u4eec\u4e09\u4e2a\u6570\u5b57\u4e4b\u79ef\u4e3a 42\uff0c\u4e09\u4e2a\u6570\u5b57\u4e4b\u548c\u4e3a 12\u3002<br>\u601d\u8003\uff1a\u5982\u4f55\u6c42\u51fa\u4e00\u4e2a\u4e09\u4f4d\u6570\u7684\u767e\u4f4d\u3001\u5341\u4f4d\u548c\u4e2a\u4f4d\uff1f<\/li>\n<\/ol>\n\n\n\n<h1 class=\"wp-block-heading\">\u4e8c\u3001\u6e90\u7801\uff1a<\/h1>\n\n\n\n<p>\u5b9e\u9a8c\uff081\uff09<\/p>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono\" style=\"font-size:.875rem;font-family:Code-Pro-JetBrains-Mono,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;line-height:1.25rem;--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span style=\"display:block;padding:16px 0 0 16px;margin-bottom:-1px;width:100%;text-align:left;background-color:#2e3440ff\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"54\" height=\"14\" viewBox=\"0 0 54 14\"><g fill=\"none\" fill-rule=\"evenodd\" transform=\"translate(1 1)\"><circle cx=\"6\" cy=\"6\" r=\"6\" fill=\"#FF5F56\" stroke=\"#E0443E\" stroke-width=\".5\"><\/circle><circle cx=\"26\" cy=\"6\" r=\"6\" fill=\"#FFBD2E\" stroke=\"#DEA123\" stroke-width=\".5\"><\/circle><circle cx=\"46\" cy=\"6\" r=\"6\" fill=\"#27C93F\" stroke=\"#1AAB29\" stroke-width=\".5\"><\/circle><\/g><\/svg><\/span><span role=\"button\" tabindex=\"0\" data-code=\"#include <stdio.h&gt;\n\nint main() {\n    double sum;\/\/\u7528\u4e8e\u5b58\u50a8\u6bcf\u6b21\u8ba1\u7b97\u540e\u7684\u503c\n    for (int i = 1; i <= 100; i++) {\n        if (i % 2 == 1)\/\/\u5224\u65ad\u5206\u6bcd\u662f\u5947\u6570\u8fd8\u662f\u5076\u6570\uff0c\u4ece\u800c\u8fdb\u884c\u52a0\u6216\u51cf\n            sum += 1.0 \/ i;\n        else\n            sum -= 1.0 \/ i;\n    }\n    printf(&quot;1 - 1\/2 + 1\/3 - 1\/4 +\u2026+ 1\/99 - 1\/100 = %lf&quot;, sum);\/\/\u8f93\u51fa\n    return 0;\n}\" style=\"color:#d8dee9ff;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2\"><\/path><\/svg><\/span><pre class=\"shiki nord\" style=\"background-color: #2e3440ff\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #5E81AC; font-weight: bold\">#<\/span><span style=\"color: #81A1C1\">include<\/span><span style=\"color: #5E81AC\"> <\/span><span style=\"color: #ECEFF4\">&lt;<\/span><span style=\"color: #A3BE8C\">stdio.h<\/span><span style=\"color: #ECEFF4\">&gt;<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #81A1C1\">int<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">main<\/span><span style=\"color: #ECEFF4\">()<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #81A1C1\">double<\/span><span style=\"color: #D8DEE9FF\"> sum<\/span><span style=\"color: #81A1C1\">;<\/span><span style=\"color: #616E88\">\/\/\u7528\u4e8e\u5b58\u50a8\u6bcf\u6b21\u8ba1\u7b97\u540e\u7684\u503c<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #81A1C1\">for<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #81A1C1\">int<\/span><span style=\"color: #D8DEE9FF\"> i <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">1<\/span><span style=\"color: #81A1C1\">;<\/span><span style=\"color: #D8DEE9FF\"> i <\/span><span style=\"color: #81A1C1\">&lt;=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">100<\/span><span style=\"color: #81A1C1\">;<\/span><span style=\"color: #D8DEE9FF\"> i<\/span><span style=\"color: #81A1C1\">++<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #81A1C1\">if<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">i <\/span><span style=\"color: #81A1C1\">%<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">2<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">==<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">1<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #616E88\">\/\/\u5224\u65ad\u5206\u6bcd\u662f\u5947\u6570\u8fd8\u662f\u5076\u6570\uff0c\u4ece\u800c\u8fdb\u884c\u52a0\u6216\u51cf<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">            sum <\/span><span style=\"color: #81A1C1\">+=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">1.0<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">\/<\/span><span style=\"color: #D8DEE9FF\"> i<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #81A1C1\">else<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">            sum <\/span><span style=\"color: #81A1C1\">-=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">1.0<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">\/<\/span><span style=\"color: #D8DEE9FF\"> i<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #88C0D0\">printf<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\">1 - 1\/2 + 1\/3 - 1\/4 +\u2026+ 1\/99 - 1\/100 = %lf<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> sum<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #81A1C1\">;<\/span><span style=\"color: #616E88\">\/\/\u8f93\u51fa<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #81A1C1\">return<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">0<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p>\u5b9e\u9a8c\uff082\uff09<\/p>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono\" style=\"font-size:.875rem;font-family:Code-Pro-JetBrains-Mono,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;line-height:1.25rem;--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span style=\"display:block;padding:16px 0 0 16px;margin-bottom:-1px;width:100%;text-align:left;background-color:#2e3440ff\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"54\" height=\"14\" viewBox=\"0 0 54 14\"><g fill=\"none\" fill-rule=\"evenodd\" transform=\"translate(1 1)\"><circle cx=\"6\" cy=\"6\" r=\"6\" fill=\"#FF5F56\" stroke=\"#E0443E\" stroke-width=\".5\"><\/circle><circle cx=\"26\" cy=\"6\" r=\"6\" fill=\"#FFBD2E\" stroke=\"#DEA123\" stroke-width=\".5\"><\/circle><circle cx=\"46\" cy=\"6\" r=\"6\" fill=\"#27C93F\" stroke=\"#1AAB29\" stroke-width=\".5\"><\/circle><\/g><\/svg><\/span><span role=\"button\" tabindex=\"0\" data-code=\"#include <stdio.h&gt;\n\nint main() {\n    int a, b, c; \/\/\u5206\u522b\u7528\u4e8e\u5b58\u50a8i\u7684\u767e\u4f4d\u3001\u5341\u4f4d\u3001\u4e2a\u4f4d\n    printf(&quot;200\u5230300\u6ee1\u8db3\u6761\u4ef6\u4e09\u4e2a\u6570\u5b57\u4e4b\u79ef\u4e3a 42\uff0c\u4e09\u4e2a\u6570\u5b57\u4e4b\u548c\u4e3a 12 \u7684\u6709\uff1a\\n&quot;);\n    for (int i = 201; i < 300; i++) {\n        a = i \/ 100;\n        b = i % 100 \/ 10;\n        c = i % 10;\n        if (a * b * c == 42 &amp;&amp; a + b + c == 12)\/\/\u5224\u65ad\u662f\u5426\u6ee1\u8db3\u6761\u4ef6\n            printf(&quot;%d &quot;, i);\/\/\u8f93\u51fa\uff0c\u5e76\u7528\u7a7a\u683c\u9694\u5f00\n    }\n    return 0;\n}\" style=\"color:#d8dee9ff;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2m-6 9l2 2 4-4\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M9 5H7a2 2 0 00-2 2v12a2 2 0 002 2h10a2 2 0 002-2V7a2 2 0 00-2-2h-2M9 5a2 2 0 002 2h2a2 2 0 002-2M9 5a2 2 0 012-2h2a2 2 0 012 2\"><\/path><\/svg><\/span><pre class=\"shiki nord\" style=\"background-color: #2e3440ff\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #5E81AC; font-weight: bold\">#<\/span><span style=\"color: #81A1C1\">include<\/span><span style=\"color: #5E81AC\"> <\/span><span style=\"color: #ECEFF4\">&lt;<\/span><span style=\"color: #A3BE8C\">stdio.h<\/span><span style=\"color: #ECEFF4\">&gt;<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #81A1C1\">int<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #88C0D0\">main<\/span><span style=\"color: #ECEFF4\">()<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #81A1C1\">int<\/span><span style=\"color: #D8DEE9FF\"> a<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> b<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> c<\/span><span style=\"color: #81A1C1\">;<\/span><span style=\"color: #616E88\"> \/\/\u5206\u522b\u7528\u4e8e\u5b58\u50a8i\u7684\u767e\u4f4d\u3001\u5341\u4f4d\u3001\u4e2a\u4f4d<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #88C0D0\">printf<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\">200\u5230300\u6ee1\u8db3\u6761\u4ef6\u4e09\u4e2a\u6570\u5b57\u4e4b\u79ef\u4e3a 42\uff0c\u4e09\u4e2a\u6570\u5b57\u4e4b\u548c\u4e3a 12 \u7684\u6709\uff1a<\/span><span style=\"color: #EBCB8B\">\\n<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #81A1C1\">for<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #81A1C1\">int<\/span><span style=\"color: #D8DEE9FF\"> i <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">201<\/span><span style=\"color: #81A1C1\">;<\/span><span style=\"color: #D8DEE9FF\"> i <\/span><span style=\"color: #81A1C1\">&lt;<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">300<\/span><span style=\"color: #81A1C1\">;<\/span><span style=\"color: #D8DEE9FF\"> i<\/span><span style=\"color: #81A1C1\">++<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        a <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> i <\/span><span style=\"color: #81A1C1\">\/<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">100<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        b <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> i <\/span><span style=\"color: #81A1C1\">%<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">100<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">\/<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">10<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        c <\/span><span style=\"color: #81A1C1\">=<\/span><span style=\"color: #D8DEE9FF\"> i <\/span><span style=\"color: #81A1C1\">%<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">10<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">        <\/span><span style=\"color: #81A1C1\">if<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #D8DEE9FF\">a <\/span><span style=\"color: #81A1C1\">*<\/span><span style=\"color: #D8DEE9FF\"> b <\/span><span style=\"color: #81A1C1\">*<\/span><span style=\"color: #D8DEE9FF\"> c <\/span><span style=\"color: #81A1C1\">==<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">42<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #81A1C1\">&amp;&amp;<\/span><span style=\"color: #D8DEE9FF\"> a <\/span><span style=\"color: #81A1C1\">+<\/span><span style=\"color: #D8DEE9FF\"> b <\/span><span style=\"color: #81A1C1\">+<\/span><span style=\"color: #D8DEE9FF\"> c <\/span><span style=\"color: #81A1C1\">==<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">12<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #616E88\">\/\/\u5224\u65ad\u662f\u5426\u6ee1\u8db3\u6761\u4ef6<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">            <\/span><span style=\"color: #88C0D0\">printf<\/span><span style=\"color: #ECEFF4\">(<\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #A3BE8C\">%d <\/span><span style=\"color: #ECEFF4\">&quot;<\/span><span style=\"color: #ECEFF4\">,<\/span><span style=\"color: #D8DEE9FF\"> i<\/span><span style=\"color: #ECEFF4\">)<\/span><span style=\"color: #81A1C1\">;<\/span><span style=\"color: #616E88\">\/\/\u8f93\u51fa\uff0c\u5e76\u7528\u7a7a\u683c\u9694\u5f00<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #ECEFF4\">}<\/span><\/span>\n<span class=\"line\"><span style=\"color: #D8DEE9FF\">    <\/span><span style=\"color: #81A1C1\">return<\/span><span style=\"color: #D8DEE9FF\"> <\/span><span style=\"color: #B48EAD\">0<\/span><span style=\"color: #81A1C1\">;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #ECEFF4\">}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p># 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