{"id":567,"date":"2026-07-04T16:55:26","date_gmt":"2026-07-04T08:55:26","guid":{"rendered":"https:\/\/mitongxue.cn\/?p=567"},"modified":"2026-07-04T16:55:26","modified_gmt":"2026-07-04T08:55:26","slug":"%e9%80%92%e5%bd%92%ef%bc%9anc68-%e8%b7%b3%e5%8f%b0%e9%98%b6","status":"publish","type":"post","link":"https:\/\/mitongxue.cn\/index.php\/2026\/07\/04\/%e9%80%92%e5%bd%92%ef%bc%9anc68-%e8%b7%b3%e5%8f%b0%e9%98%b6\/","title":{"rendered":"\u9012\u5f52\uff1aNC68.\u8df3\u53f0\u9636"},"content":{"rendered":"\n<h2 class=\"wp-block-heading\">\u63cf\u8ff0<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u4e00\u53ea\u9752\u86d9\u4e00\u6b21\u53ef\u4ee5\u8df3\u4e0a1\u7ea7\u53f0\u9636\uff0c\u4e5f\u53ef\u4ee5\u8df3\u4e0a2\u7ea7\u3002\u6c42\u8be5\u9752\u86d9\u8df3\u4e0a\u4e00\u4e2a n \u7ea7\u7684\u53f0\u9636\u603b\u5171\u6709\u591a\u5c11\u79cd\u8df3\u6cd5\uff08\u5148\u540e\u6b21\u5e8f\u4e0d\u540c\u7b97\u4e0d\u540c\u7684\u7ed3\u679c\uff09\u3002<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u6570\u636e\u8303\u56f4\uff1a<math><semantics><mrow><mn>1<\/mn><mo>\u2264<\/mo><mi>n<\/mi><mo>\u2264<\/mo><mn>40<\/mn><\/mrow><\/semantics><\/math>1\u2264<em>n<\/em>\u226440<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u8981\u6c42\uff1a\u65f6\u95f4\u590d\u6742\u5ea6\uff1a<math><semantics><mrow><mi>O<\/mi><mo stretchy=\"false\">(<\/mo><mi>n<\/mi><mo stretchy=\"false\">)<\/mo><\/mrow><\/semantics><\/math><em>O<\/em>(<em>n<\/em>)&nbsp;\uff0c\u7a7a\u95f4\u590d\u6742\u5ea6\uff1a&nbsp;<math><semantics><mrow><mi>O<\/mi><mo stretchy=\"false\">(<\/mo><mn>1<\/mn><mo stretchy=\"false\">)<\/mo><\/mrow><\/semantics><\/math><em>O<\/em>(1)<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">\u793a\u4f8b1<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u8f93\u5165\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>2<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd4\u56de\u503c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>2<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8bf4\u660e\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">\u9752\u86d9\u8981\u8df3\u4e0a\u4e24\u7ea7\u53f0\u9636\u6709\u4e24\u79cd\u8df3\u6cd5\uff0c\u5206\u522b\u662f\uff1a\u5148\u8df3\u4e00\u7ea7\uff0c\u518d\u8df3\u4e00\u7ea7\u6216\u8005\u76f4\u63a5\u8df3\u4e24\u7ea7\u3002\u56e0\u6b64\u7b54\u6848\u4e3a2       <\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">\u793a\u4f8b2<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">\u8f93\u5165\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>7<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">\u8fd4\u56de\u503c\uff1a<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>21<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>\/**\n * \u4ee3\u7801\u4e2d\u7684\u7c7b\u540d\u3001\u65b9\u6cd5\u540d\u3001\u53c2\u6570\u540d\u5df2\u7ecf\u6307\u5b9a\uff0c\u8bf7\u52ff\u4fee\u6539\uff0c\u76f4\u63a5\u8fd4\u56de\u65b9\u6cd5\u89c4\u5b9a\u7684\u503c\u5373\u53ef\n *\n * \n * @param number int\u6574\u578b \n * @return int\u6574\u578b\n *\/\nfunction jumpFloor( number ) {\n    \/\/ write code here\n    if (number &lt;= 0) return 0\n    if(number===1){\n        return 1;\n    }\n    if(number===2){\n        return 2;\n    }\n    \n    const temp = jumpFloor(number -2) + jumpFloor(number-1);\n    \/\/console.log('number:',number,'   temp:',temp)\n    return temp;\n \n}<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\"> \u8fed\u4ee3\u52a8\u6001\u89c4\u5212\uff08\u6700\u4f18\uff0cO (n) \u65f6\u95f4 O (1) \u7a7a\u95f4\uff09<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>\n\nfunction jumpFloor(n) {\n    if(n === 1) return 1;\n    if(n === 2) return 2;\n    let a = 1, b = 2;\n    for(let i = 3; i &lt;= n; i++){\n        let c = a + b;\n        a = b;\n        b = c;\n    }\n    return b;\n}<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u63cf\u8ff0 \u4e00\u53ea\u9752\u86d9\u4e00\u6b21\u53ef\u4ee5\u8df3\u4e0a1\u7ea7\u53f0\u9636\uff0c\u4e5f\u53ef\u4ee5\u8df3\u4e0a2\u7ea7..<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[16,11,23],"tags":[],"class_list":["post-567","post","type-post","status-publish","format-standard","hentry","category-js","category-front","category-23"],"featured_image_urls":{"full":"","thumbnail":"","medium":"","medium_large":"","large":"","1536x1536":"","2048x2048":""},"author_info":{"info":["\u9648 \u67d0\u4eba"]},"category_info":"<a href=\"https:\/\/mitongxue.cn\/index.php\/category\/front\/js\/\" rel=\"category tag\">JS<\/a> <a href=\"https:\/\/mitongxue.cn\/index.php\/category\/front\/\" rel=\"category tag\">\u524d\u7aef<\/a> <a href=\"https:\/\/mitongxue.cn\/index.php\/category\/front\/%e8%af%95%e9%a2%98\/\" rel=\"category tag\">\u8bd5\u9898<\/a>","tag_info":"\u8bd5\u9898","comment_count":"0","_links":{"self":[{"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/posts\/567","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/comments?post=567"}],"version-history":[{"count":1,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/posts\/567\/revisions"}],"predecessor-version":[{"id":568,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/posts\/567\/revisions\/568"}],"wp:attachment":[{"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/media?parent=567"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/categories?post=567"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mitongxue.cn\/index.php\/wp-json\/wp\/v2\/tags?post=567"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}