{"id":482,"date":"2023-04-12T14:17:36","date_gmt":"2023-04-12T06:17:36","guid":{"rendered":"https:\/\/blog.cirno.fun\/?p=482"},"modified":"2025-03-19T00:34:12","modified_gmt":"2025-03-18T16:34:12","slug":"leetcode115-%e6%9c%80%e5%b0%8f%e6%a0%88","status":"publish","type":"post","link":"https:\/\/blog.sssn.tech\/?p=482","title":{"rendered":"Leetcode115.\u6700\u5c0f\u6808"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/blog.sssn.tech\/wp-content\/uploads\/2023\/04\/image-1681279659746.png\" alt=\"file\" \/><\/p>\n<p>\u9898\u76ee\u8981\u6c42\u7ef4\u62a4\u4e00\u4e2a\u6808\uff0c\u9664\u4e86\u652f\u6301\u666e\u901a\u6808\u7684\u538b\u6808\uff0c\u67e5\u9876\uff0c\u5f39\u51fa\u64cd\u4f5c\u5916\uff0c\u8fd8\u9700\u652f\u6301\u4e00\u4e2aO(1)\u7684\u67e5\u8be2\u6808\u5185\u6700\u5c0f\u5143\u7d20\u7684\u64cd\u4f5c<\/p>\n<p>\u53ef\u4ee5\u8fd9\u4e48\u601d\u8003\u8fd9\u4e2a\u95ee\u9898:<\/p>\n<p>\u5b9a\u4e49\u4e00\u4e2a\u666e\u901a\u7684\u6808s\uff0c\u4e00\u4e2a\u4fdd\u5b58\u5f53\u524d\u6808s\u7684\u6700\u5c0f\u5143\u7d20\u7684\u6808sMin\uff0c\u5bf9\u4e8e\u538b\u6808\u548c\u5f39\u51fa\u64cd\u4f5c\uff0c\u4ed6\u4eec\u4e24\u4e2a\u4fdd\u6301\u540c\u6b65<\/p>\n<p>\u5bf9\u4e8e\u4e00\u4e2a\u65b0\u538b\u5165\u7684\u5143\u7d20x\uff0c\u5982\u679cx\u5927\u4e8e\u7b49\u4e8e\u73b0\u5728\u5df2\u77e5\u7684\u6808\u5185\u6700\u5c0f\u5143\u7d20\uff0c\u5219x\u5bf9\u4e8e\u6700\u5c0f\u5143\u7d20\u662f<strong>\u6ca1\u6709\u8d21\u732e\u7684<\/strong>\uff0c\u6709\u6ca1\u6709\u4ed6\u90fd\u4e00\u6837\uff0c\u6240\u4ee5\u538b\u5165s\uff0csMin\u538b\u5165\u5f53\u524dsMin.top()\uff0c\u7528\u4e8e\u4fdd\u6301\u4e24\u4e2a\u6808\u7684\u5143\u7d20\u540c\u6b65\uff0c\u4ee5\u7ef4\u62a4\u5f39\u51fa\u64cd\u4f5c\uff0c\u6b64\u65f6\u53ef\u4ee5\u8bf4\u6211\u4eec<strong>\u7ef4\u6301\u73b0\u72b6<\/strong><\/p>\n<p>\u5bf9\u4e8e\u5c0f\u4e8e\u5f53\u524d\u5df2\u77e5\u7684\u6808\u5185\u6700\u5c0f\u5143\u7d20x\uff0c\u5e94\u5f53\u540c\u65f6\u538b\u5165\u4e24\u4e2a\u6808\u4e2d\uff0c\u6b64\u65f6\u53ef\u4ee5\u8bf4<strong>\u66f4\u65b0\u7b54\u6848<\/strong><\/p>\n<pre><code class=\"language-cpp\">class MinStack {\npublic:\n    stack&lt;int&gt; s;\n    stack&lt;int&gt; sMin;\n\n    MinStack() {\n        ;\n    }\n\n    void push(int val) {\n        if (s.empty()) {\n            s.push(val);\n            sMin.push(val);\n        }else if (val &lt; sMin.top()) {\n            \/\/ \u66f4\u65b0\u7b54\u6848\n            s.push(val);\n            sMin.push(val);\n        } else {\n            \/\/ \u7ef4\u6301\u73b0\u72b6\n            s.push(val);\n            sMin.push(sMin.top());\n        }\n    }\n\n    void pop() {\n        s.pop();\n        sMin.pop();\n    }\n\n    int top() {\n        return s.top();\n    }\n\n    int getMin() {\n        return sMin.top();\n    }\n};<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u9898\u76ee\u8981\u6c42\u7ef4\u62a4\u4e00\u4e2a\u6808\uff0c\u9664\u4e86\u652f\u6301\u666e\u901a\u6808\u7684\u538b\u6808\uff0c\u67e5\u9876\uff0c\u5f39\u51fa\u64cd\u4f5c\u5916\uff0c\u8fd8\u9700\u652f\u6301\u4e00\u4e2aO(1) [&#8230;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[23],"tags":[],"class_list":["post-482","post","type-post","status-publish","format-standard","hentry","category-23"],"_links":{"self":[{"href":"https:\/\/blog.sssn.tech\/index.php?rest_route=\/wp\/v2\/posts\/482","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/blog.sssn.tech\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/blog.sssn.tech\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/blog.sssn.tech\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/blog.sssn.tech\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=482"}],"version-history":[{"count":2,"href":"https:\/\/blog.sssn.tech\/index.php?rest_route=\/wp\/v2\/posts\/482\/revisions"}],"predecessor-version":[{"id":839,"href":"https:\/\/blog.sssn.tech\/index.php?rest_route=\/wp\/v2\/posts\/482\/revisions\/839"}],"wp:attachment":[{"href":"https:\/\/blog.sssn.tech\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=482"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/blog.sssn.tech\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=482"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/blog.sssn.tech\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=482"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}