{"id":1011,"date":"2025-12-23T05:31:34","date_gmt":"2025-12-22T21:31:34","guid":{"rendered":"https:\/\/www.guanhaobo.cn\/?p=1011"},"modified":"2025-12-23T05:31:34","modified_gmt":"2025-12-22T21:31:34","slug":"leetcode-84-%e6%9f%b1%e7%8a%b6%e5%9b%be%e4%b8%ad%e6%9c%80%e5%a4%a7%e7%9a%84%e7%9f%a9%e5%bd%a2","status":"publish","type":"post","link":"https:\/\/www.guanhaobo.cn\/?p=1011","title":{"rendered":"LeetCode 84 \u2013 \u67f1\u72b6\u56fe\u4e2d\u6700\u5927\u7684\u77e9\u5f62"},"content":{"rendered":"

\u9898\u76ee\u63cf\u8ff0<\/h1>\n

\u7ed9\u5b9a n \u4e2a\u975e\u8d1f\u6574\u6570\uff0c\u7528\u6765\u8868\u793a\u67f1\u72b6\u56fe\u4e2d\u5404\u4e2a\u67f1\u5b50\u7684\u9ad8\u5ea6\u3002\u6bcf\u4e2a\u67f1\u5b50\u5f7c\u6b64\u76f8\u90bb\uff0c\u4e14\u5bbd\u5ea6\u4e3a 1 \u3002
\n\u6c42\u5728\u8be5\u67f1\u72b6\u56fe\u4e2d\uff0c\u80fd\u591f\u52fe\u52d2\u51fa\u6765\u7684\u77e9\u5f62\u7684\u6700\u5927\u9762\u79ef\u3002<\/p>\n

\u793a\u4f8b\uff1a
\n\"\"<\/a><\/p>\n

\u8f93\u5165\uff1aheights = [2,1,5,6,2,3]
\n\u8f93\u51fa\uff1a10
\n\u89e3\u91ca\uff1a\u6700\u5927\u7684\u77e9\u5f62\u4e3a\u56fe\u4e2d\u7ea2\u8272\u533a\u57df\uff0c\u9762\u79ef\u4e3a 10<\/p>\n

\u9898\u76ee\u5206\u6790<\/h1>\n

\u6700\u5927\u77e9\u5f62\u7684\u9ad8\u4e00\u5b9a\u662f\u67d0\u4e2a\u67f1\u5b50\u7684\u9ad8\uff0c\u56e0\u6b64\u679a\u4e3e\u6bcf\u4e2a\u67f1\u5b50\uff0c\u8ba1\u7b97\u4ee5\u5176\u4e3a\u9ad8\u7684\u77e9\u5f62\u7684\u6700\u5927\u9762\u79ef\u3002\u5bf9\u4e8e\u4e00\u4e2a\u67f1\u5b50\u6765\u8bf4\uff0c\u4ee5\u5176\u9ad8\u5ea6 h \u4e3a\u9ad8\u7684\u77e9\u5f62\uff0c\u6700\u5927\u5bbd\u5ea6\u662f\u4e0d\u65ad\u5411\u5de6\/\u53f3\u5ef6\u4f38\uff0c\u76f4\u5230\u7b2c\u4e00\u4e2a\u9ad8\u5ea6\u5c0f\u4e8e h \u7684\u67f1\u5b50\u3002\u56e0\u6b64\u95ee\u9898\u8f6c\u5316\u6210\u4e86\uff0c\u5bfb\u627e\u6bcf\u4e2a\u67f1\u5b50\u5728\u5de6\u4fa7\u548c\u53f3\u4fa7\u7684\u7b2c\u4e00\u4e2a\u66f4\u5c0f\u7684\u67f1\u5b50\u3002<\/p>\n

\u53ef\u4ee5\u4f7f\u7528\u5355\u8c03\u6808\u5b9e\u73b0\uff0c\u6808\u5185\u4fdd\u6301\u4ece\u5e95\u5230\u9876\u9012\u589e\u3002\u6bcf\u6b21\u653e\u5165\u67f1\u5b50 i \u524d\uff0c\u5148\u5c06\u6808\u91cc\u6bd4\u81ea\u5df1\u66f4\u9ad8\u7684\u67f1\u5b50\u90fd\u79fb\u51fa\uff0c\u5728\u79fb\u9664\u8fc7\u7a0b\u4e2d\u8ba1\u7b97\u4ee5\u88ab\u79fb\u51fa\u67f1\u5b50\u4e3a\u9ad8\u7684\u6700\u5927\u77e9\u5f62\u9762\u79ef\uff08\u79fb\u9664\u540e\uff0c\u65b0\u7684\u6808\u9876\u67f1\u5b50\u7684\u9ad8\u4e00\u5b9a\u5c0f\u4e8e\u88ab\u79fb\u51fa\u67f1\u5b50\u7684\u9ad8\uff0c\u6240\u4ee5\u6700\u5927\u5bbd\u5ea6\u662f i – \u6808\u9876\u67f1\u5b50\u4e0b\u6807 – 1\uff09\u3002<\/p>\n

\u4ee3\u7801\u4e2d\u5728\u6808\u91cc\u653e\u5165\u67f1\u5b50\u7684\u4e0b\u6807\u5373\u53ef\uff0c\u9700\u8981\u65f6\u53ef\u901a\u8fc7\u6570\u7ec4\u8bfb\u53d6\u5bf9\u5e94\u9ad8\u5ea6\u3002
\n\u6700\u540e\u4e00\u4e2a\u67f1\u5b50\uff0c\u9700\u8981\u989d\u5916\u89e6\u53d1\u51fa\u6808\uff0c\u53ef\u4ee5\u5728\u539f\u6570\u7ec4\u6700\u53f3\u4fa7\u589e\u52a0\u4e00\u4e2a\u9ad8\u5ea6\u4e3a0\u7684\u67f1\u5b50\uff0c\u7b80\u5316\u4ee3\u7801\u3002
\n\u6808\u5e95\u67f1\u5b50\u51fa\u6808\u65f6\uff0c\u9700\u8981\u989d\u5916\u8ba1\u7b97\u5de6\u4fa7\u7684\u5bbd\u5ea6\uff0c\u53ef\u4ee5\u5728\u539f\u6570\u7ec4\u6700\u5de6\u4fa7\u589e\u52a0\u4e00\u4e2a\u9ad8\u5ea6\u4e3a0\u7684\u67f1\u5b50\uff0c\u7b80\u5316\u4ee3\u7801\u3002<\/p>\n

\u65f6\u95f4\u590d\u6742\u5ea6 O(n).<\/p>\n

Java<\/h1>\n
public int largestRectangleArea(int[] heights) {\n    int ans = 0;\n    Deque<Integer> stack = new LinkedList<>();\n    int[] h = new int[heights.length + 2];\n    System.arraycopy(heights, 0, h, 1, heights.length);\n\n    for(int i = 0; i < h.length; i++) {\n        while(!stack.isEmpty() && h[stack.peek()] > h[i]) {\n            int height = h[stack.pop()];\n            int width = i - stack.peek() - 1;\n            ans = Math.max(ans, width * height);\n        }\n        stack.push(i);\n    }\n    return ans;\n}\n<\/code><\/pre>\n
Kotlin<\/h1>\n
fun largestRectangleArea(heights: IntArray): Int {\n    var ans = 0\n    val stack = LinkedList<Int>()\n    val h = IntArray(heights.size + 2) { i -> if (i in 1..heights.size) heights[i - 1] else 0 }\n    for (i in h.indices) {\n        while (stack.isNotEmpty() && h[stack.peek()] > h[i]) {\n            val height = h[stack.pop()]\n            val width = i - stack.peek() - 1\n            ans = max(ans, height * width)\n        }\n        stack.push(i)\n    }\n    return ans\n}\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
\u9898\u76ee\u63cf\u8ff0 \u7ed9\u5b9a n \u4e2a\u975e\u8d1f\u6574\u6570\uff0c\u7528\u6765\u8868\u793a\u67f1\u72b6\u56fe\u4e2d\u5404\u4e2a\u67f1\u5b50\u7684\u9ad8\u5ea6\u3002\u6bcf\u4e2a\u67f1\u5b50\u5f7c\u6b64\u76f8\u90bb\uff0c\u4e14\u5bbd\u5ea6\u4e3a 1 \u3002 \u6c42\u5728\u8be5\u67f1\u72b6 […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[20,76],"class_list":["post-1011","post","type-post","status-publish","format-standard","hentry","category-algo","tag-leetcode","tag-76"],"_links":{"self":[{"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/posts\/1011","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1011"}],"version-history":[{"count":1,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/posts\/1011\/revisions"}],"predecessor-version":[{"id":1012,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/posts\/1011\/revisions\/1012"}],"wp:attachment":[{"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1011"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1011"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1011"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}