{"id":127,"date":"2021-04-08T06:06:00","date_gmt":"2021-04-08T06:06:00","guid":{"rendered":"https:\/\/imwarming.com\/?p=127"},"modified":"2021-04-08T06:06:00","modified_gmt":"2021-04-08T06:06:00","slug":"%e6%a0%91%e7%8a%b6%e6%95%b0%e7%bb%84","status":"publish","type":"post","link":"https:\/\/imwarming.com\/?p=127","title":{"rendered":"\u6811\u72b6\u6570\u7ec4"},"content":{"rendered":"<p>from \uff1a <a href=\"https:\/\/www.acwing.com\/blog\/content\/80\/\" target=\"_blank\" rel=\"noopener\">acwing<\/a>&nbsp;<\/p>\n<div class=\"cnblogs_code\">\n<pre>#include &lt;bits\/stdc++.h&gt;\n<span style=\"color: #0000ff;\">using<\/span> <span style=\"color: #0000ff;\">namespace<\/span><span style=\"color: #000000;\"> std;\n<\/span><span style=\"color: #0000ff;\">const<\/span> <span style=\"color: #0000ff;\">int<\/span> n = <span style=\"color: #800080;\">100001<\/span><span style=\"color: #000000;\">;\n<\/span><span style=\"color: #0000ff;\">int<\/span><span style=\"color: #000000;\"> n, m;\n<\/span><span style=\"color: #0000ff;\">int<\/span><span style=\"color: #000000;\"> tree[n], a[n];\n\n<\/span><span style=\"color: #0000ff;\">int<\/span> lowbit(<span style=\"color: #0000ff;\">int<\/span><span style=\"color: #000000;\"> x){\n    <\/span><span style=\"color: #0000ff;\">return<\/span> x &amp; -<span style=\"color: #000000;\">x;\n}\n\n<\/span><span style=\"color: #0000ff;\">void<\/span> update(<span style=\"color: #0000ff;\">int<\/span> x, <span style=\"color: #0000ff;\">int<\/span> v){<span style=\"color: #008000;\">\/\/<\/span><span style=\"color: #008000;\">\u8fd9\u662f\u4e0b\u6807x\u6570\u52a0\u4e0av\u503c<\/span>\n    <span style=\"color: #0000ff;\">for<\/span>(<span style=\"color: #0000ff;\">int<\/span> i = x; i &lt;= n; i += lowbit(i)) tree[i] +=<span style=\"color: #000000;\"> v;\n}\n\n<\/span><span style=\"color: #0000ff;\">int<\/span> query(<span style=\"color: #0000ff;\">int<\/span> x){<span style=\"color: #008000;\">\/\/<\/span><span style=\"color: #008000;\">\u6c42\u524d\u7f00\u548c<\/span>\n    <span style=\"color: #0000ff;\">int<\/span> res = <span style=\"color: #800080;\">0<\/span><span style=\"color: #000000;\">;\n    <\/span><span style=\"color: #0000ff;\">for<\/span>(<span style=\"color: #0000ff;\">int<\/span> i = x; i; i -=<span style=\"color: #000000;\"> lowbit(i))\n        res <\/span>+=<span style=\"color: #000000;\"> tree[i];\n    <\/span><span style=\"color: #0000ff;\">return<\/span><span style=\"color: #000000;\"> res;\n}\n<\/span><span style=\"color: #0000ff;\">int<\/span><span style=\"color: #000000;\"> main(){\n    cin <\/span>&gt;&gt; n &gt;&gt;<span style=\"color: #000000;\"> m;\n    <\/span><span style=\"color: #0000ff;\">for<\/span>(<span style=\"color: #0000ff;\">int<\/span> i = <span style=\"color: #800080;\">1<\/span>; i &lt;= n; i ++ ) cin &gt;&gt;<span style=\"color: #000000;\"> a[i];\n    <\/span><span style=\"color: #0000ff;\">for<\/span>(<span style=\"color: #0000ff;\">int<\/span> i = <span style=\"color: #800080;\">1<\/span>; i &lt;= n; i ++ ) update(i, a[i]);<span style=\"color: #008000;\">\/\/<\/span><span style=\"color: #008000;\">\u8fd9\u662f\u521d\u59cb\u5316\u524d\u7f00\u548c\uff0c\u4e0d\u662f\u4ee5\u524d\u90a3\u6837<\/span>\n    \n    <span style=\"color: #0000ff;\">int<\/span><span style=\"color: #000000;\"> k, x, y;\n    <\/span><span style=\"color: #0000ff;\">while<\/span>(m --<span style=\"color: #000000;\"> ){\n        cin <\/span>&gt;&gt; k &gt;&gt; x &gt;&gt;<span style=\"color: #000000;\"> y;\n        <\/span><span style=\"color: #0000ff;\">if<\/span>(k == <span style=\"color: #800080;\">0<\/span><span style=\"color: #000000;\">){\n            cout <\/span>&lt;&lt; query(y) - query(x - <span style=\"color: #800080;\">1<\/span>) &lt;&lt; <span style=\"color: #800000;\">\"<\/span><span style=\"color: #800000;\">n<\/span><span style=\"color: #800000;\">\"<\/span><span style=\"color: #000000;\">;\n        }<\/span><span style=\"color: #0000ff;\">else<\/span><span style=\"color: #000000;\"> update(x, y);\n    }\n    \n    <\/span><span style=\"color: #0000ff;\">return<\/span> <span style=\"color: #800080;\">0<\/span><span style=\"color: #000000;\">;\n}<\/span><\/pre>\n<\/div>\n<p>&nbsp;<\/p>\n<div class=\"memorize_new_word_loading\" style=\"display: none;\">&nbsp;<\/div>\n","protected":false},"excerpt":{"rendered":"<p>from \uff1a acwing&nbsp; #include &lt;bits\/stdc++.h&gt; [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-127","post","type-post","status-publish","format-standard","hentry","category-uncategorized"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v18.6 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>\u6811\u72b6\u6570\u7ec4 - imwarming<\/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:\/\/imwarming.com\/?p=127\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"\u6811\u72b6\u6570\u7ec4 - imwarming\" \/>\n<meta property=\"og:description\" content=\"from \uff1a acwing&nbsp; 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