{"id":10006253,"date":"2022-08-21T00:48:28","date_gmt":"2022-08-20T16:48:28","guid":{"rendered":"https:\/\/ityet.com\/?p=10006253"},"modified":"2022-08-21T00:48:28","modified_gmt":"2022-08-20T16:48:28","slug":"leetcode-55-%e8%b7%b3%e8%b7%83%e6%b8%b8%e6%88%8f","status":"publish","type":"post","link":"https:\/\/itmax.cn\/?p=10006253","title":{"rendered":"Leetcode 55 &#8211; \u8df3\u8dc3\u6e38\u620f"},"content":{"rendered":"<p>Leetcode 55 &#8211; \u8df3\u8dc3\u6e38\u620f &#8211; \u9898\u89e3\u4ee5\u53ca\u89e3\u6790<br \/>&lt;!&#8211;more&#8211;&gt;<\/p>\n<h3>\u9898\u76ee\u63cf\u8ff0<\/h3>\n<p>\u7ed9\u5b9a\u4e00\u4e2a\u975e\u8d1f\u6574\u6570\u6570\u7ec4\uff0c\u4f60\u6700\u521d\u4f4d\u4e8e\u6570\u7ec4\u7684\u7b2c\u4e00\u4e2a\u4f4d\u7f6e\u3002<\/p>\n<p>\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u4ee3\u8868\u4f60\u5728\u8be5\u4f4d\u7f6e\u53ef\u4ee5\u8df3\u8dc3\u7684\u6700\u5927\u957f\u5ea6\u3002<\/p>\n<p>\u5224\u65ad\u4f60\u662f\u5426\u80fd\u591f\u5230\u8fbe\u6700\u540e\u4e00\u4e2a\u4f4d\u7f6e\u3002<\/p>\n<ul>\n<li>\n<p>\u793a\u4f8b 1:<\/p>\n<p>\u8f93\u5165: [2,3,1,1,4]<\/p>\n<p>\u8f93\u51fa: true<\/p>\n<p>\u89e3\u91ca: \u6211\u4eec\u53ef\u4ee5\u5148\u8df3 1 \u6b65\uff0c\u4ece\u4f4d\u7f6e 0 \u5230\u8fbe \u4f4d\u7f6e 1, \u7136\u540e\u518d\u4ece\u4f4d\u7f6e 1 \u8df3 3 \u6b65\u5230\u8fbe\u6700\u540e\u4e00\u4e2a\u4f4d\u7f6e\u3002<\/p>\n<\/li>\n<li>\n<p>\u793a\u4f8b 2:<\/p>\n<p>\u8f93\u5165: [3,2,1,0,4]<\/p>\n<p>\u8f93\u51fa: false<\/p>\n<p>\u89e3\u91ca: \u65e0\u8bba\u600e\u6837\uff0c\u4f60\u603b\u4f1a\u5230\u8fbe\u7d22\u5f15\u4e3a 3 \u7684\u4f4d\u7f6e\u3002\u4f46\u8be5\u4f4d\u7f6e\u7684\u6700\u5927\u8df3\u8dc3\u957f\u5ea6\u662f 0 \uff0c \u6240\u4ee5\u4f60\u6c38\u8fdc\u4e0d\u53ef\u80fd\u5230\u8fbe\u6700\u540e\u4e00\u4e2a\u4f4d\u7f6e\u3002<\/p>\n<\/li>\n<\/ul>\n<h3>\u63d0\u4ea4\u7b54\u6848<\/h3>\n<pre><code class=\"java\">class Solution {\n    public boolean canJump(int[] nums) {\n        int length = nums.length;\n        int farPosition = 1;\n\n        for (int i = 0; i &lt; length &amp;&amp; i &lt; farPosition; i++) {\n            if (nums[i] + i &gt;= farPosition) {\n                farPosition = nums[i] + i + 1;\n            }\n            if (farPosition &gt;= length) {\n                return true;\n            }\n        }\n        return false;\n    }\n}<\/code><\/pre>\n<blockquote>\n<p><strong>\u6267\u884c\u7528\u65f6<\/strong>: 1 ms , \u5728\u6240\u6709 Java \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e86 99.93% \u7684\u7528\u6237<\/p>\n<p><strong>\u5185\u5b58\u6d88\u8017<\/strong>: 41.6 MB, \u5728\u6240\u6709 Java \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8612.50%\u7684\u7528\u6237<\/p>\n<\/blockquote>\n<h3>\u9898\u89e3\u53cd\u601d<\/h3>\n<p>\u8fd9\u9898\u91c7\u7528<strong>\u8d2a\u5fc3\u6cd5<\/strong>\u4f5c\u4e3a\u6574\u4f53\u7684\u89e3\u9898\u601d\u8def\u3002\u5373\uff1a<\/p>\n<ol>\n<li>\u7ef4\u62a4\u4e00\u4e2a\u6700\u8fdc\u80fd\u591f\u5230\u8fbe\u7684\u4f4d\u7f6e\uff08<code>farPosition<\/code>\uff09\u3002<\/li>\n<li>\u4f9d\u6b21\u904d\u5386\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e00\u9879\uff0c\u5982\u679c\u6b64\u65f6\u7684\u7d22\u5f15\u5c0f\u4e8e\u6700\u8fdc\u53ef\u5230\u8fbe\u7684\u4f4d\u7f6e\uff0c\u90a3\u4e48\u4e5f\u5c31\u662f\u8bf4\u8be5\u9879\u662f\u53ef\u4ee5\u5230\u8fbe\u7684\uff0c\u4f46\u80fd\u5426\u80fd\u591f\u5230\u8fbe\u6570\u636e\u4e2d\u7684\u6700\u540e\u4e00\u9879\uff0c\u8fd8\u9700\u8981\u7ee7\u7eed\u5224\u65ad\u3002<\/li>\n<li>\u5224\u65ad\u5f53\u524d\u9879\u7684<code>\u7d22\u5f15\u548c\u6570\u503c\u4e4b\u548c<\/code>\u662f\u5426\u5927\u4e8e\u6700\u8fdc\u53ef\u5230\u8fbe\u7684\u4f4d\u7f6e\uff0c\u5982\u679c\u5927\u4e8e\uff0c\u5219\u66f4\u65b0\u6700\u8fdc\u53ef\u5230\u8fbe\u533a\u57df\u4e3a\u5f53\u524d\u9879\u7684\u7d22\u5f15\u503c\u548c\u6570\u503c.<\/li>\n<li>\u82e5\u5f53\u524d\u53ef\u5230\u8fbe\u7684\u4f4d\u7f6e\u5927\u4e8e\u6570\u7ec4\u7684\u957f\u5ea6\u4e86\uff0c\u4e5f\u5c31\u610f\u5473\u7740\u53ef\u4ee5\u76f4\u63a5\u5230\u8fbe\u6570\u7ec4\u4e2d\u7684\u6700\u540e\u4e00\u4e2a\u4f4d\u7f6e\uff0c\u76f4\u63a5\u8fd4\u56de <code>true<\/code> \u5c31\u597d\uff0c\u5426\u5219\u5c31\u8fd4\u56de <code>false<\/code>\u3002<\/li>\n<\/ol>\n<h4>\u590d\u6742\u5ea6\u5206\u6790<\/h4>\n<ul>\n<li>\u65f6\u95f4\u590d\u6742\u5ea6\uff1a<code>O(n)<\/code>\uff0c\u6700\u5dee\u7684\u60c5\u51b5\u5c31\u662f\u4f1a\u4f9d\u6b21\u5faa\u73af\u6570\u7ec4\u7684\u6240\u6709\u5143\u7d20\u3002<\/li>\n<li>\u7a7a\u95f4\u590d\u6742\u5ea6\uff1a<code>O(1)<\/code>\uff0c\u901a\u8fc7 <code>farPosition<\/code> \u8bb0\u5f55\u6700\u8fdc\u53ef\u5230\u8fbe\u7684\u4f4d\u7f6e\uff0c\u4e0d\u9700\u8981\u989d\u5916\u7684\u7a7a\u95f4\u5f00\u9500\u3002<\/li>\n<\/ul>\n<p>\u8fd9\u9053\u9898\u6574\u4f53\u4e0a\u8fd8\u662f\u6bd4\u8f83\u7b80\u5355\u7684\uff0c\u5c31\u5148\u603b\u7ed3\u8fd9\u4e48\u591a\uff0c\u7ee7\u7eed\u575a\u6301\u7b97\u6cd5\u7ec3\u4e60\uff01<\/p>\n<blockquote><p>\u51fa\u5904\uff1aTeamind <a href=\"https:\/\/link.segmentfault.com\/?enc=QUSZ662lX4d1rhUxPCcjfg%3D%3D.hdFLmc0xLdkp%2BmsH8oEmLzEuOHS0EzkWOryQuWKz2hM%3D\" rel=\"nofollow\">https:\/\/teamind.co\/<\/a> \u6b22\u8fce\u8f6c\u8f7d\uff0c\u4e5f\u8bf7\u4fdd\u7559\u8fd9\u6bb5\u58f0\u660e\u3002\u8c22\u8c22\uff01<\/p><\/blockquote>\n<p><a href=\"https:\/\/segmentfault.com\/a\/1190000042350878\">https:\/\/segmentfault.com\/a\/1190000042350878<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Leetcode 55 &#8211; \u8df3\u8dc3\u6e38\u620f &#8211; \u9898\u89e3\u4ee5\u53ca\u89e3\u6790&lt;!&#8211;more [&hellip;]<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_jetpack_memberships_contains_paid_content":false,"footnotes":""},"categories":[],"tags":[],"class_list":["post-10006253","post","type-post","status-publish","format-standard","hentry"],"jetpack_sharing_enabled":true,"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10006253","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=10006253"}],"version-history":[{"count":0,"href":"https:\/\/itmax.cn\/index.php?rest_route=\/wp\/v2\/posts\/10006253\/revisions"}],"wp:attachment":[{"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=10006253"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=10006253"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/itmax.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=10006253"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}