{"id":855,"date":"2025-08-05T03:02:39","date_gmt":"2025-08-04T19:02:39","guid":{"rendered":"https:\/\/www.guanhaobo.cn\/?p=855"},"modified":"2025-08-05T04:42:52","modified_gmt":"2025-08-04T20:42:52","slug":"leetcode-1-%e4%b8%a4%e6%95%b0%e4%b9%8b%e5%92%8c","status":"publish","type":"post","link":"https:\/\/www.guanhaobo.cn\/?p=855","title":{"rendered":"LeetCode 1 &#8211; \u4e24\u6570\u4e4b\u548c"},"content":{"rendered":"<h1>\u9898\u76ee\u63cf\u8ff0<\/h1>\n<p>\u7ed9\u5b9a\u4e00\u4e2a\u6574\u6570\u6570\u7ec4 nums \u548c\u4e00\u4e2a\u6574\u6570\u76ee\u6807\u503c target\uff0c\u8bf7\u4f60\u5728\u8be5\u6570\u7ec4\u4e2d\u627e\u51fa \u548c\u4e3a\u76ee\u6807\u503c target  \u7684\u90a3 \u4e24\u4e2a \u6574\u6570\uff0c\u5e76\u8fd4\u56de\u5b83\u4eec\u7684\u6570\u7ec4\u4e0b\u6807\u3002<\/p>\n<p>\u4f60\u53ef\u4ee5\u5047\u8bbe\u6bcf\u79cd\u8f93\u5165\u53ea\u4f1a\u5bf9\u5e94\u4e00\u4e2a\u7b54\u6848\uff0c\u5e76\u4e14\u4f60\u4e0d\u80fd\u4f7f\u7528\u4e24\u6b21\u76f8\u540c\u7684\u5143\u7d20\u3002<\/p>\n<p>\u4f60\u53ef\u4ee5\u6309\u4efb\u610f\u987a\u5e8f\u8fd4\u56de\u7b54\u6848\u3002<\/p>\n<h1>\u9898\u76ee\u5206\u6790<\/h1>\n<ul>\n<li>\u66b4\u529b\u679a\u4e3e\uff1a\u4e24\u5c42\u5faa\u73af\uff0c\u65f6\u95f4\u590d\u6742\u5ea6<code>O(n^2)<\/code><\/li>\n<li>\u54c8\u5e0c\u8868\uff1a\u5b58\u50a8\u524d\u9762\u9047\u5230\u8fc7\u7684\u6570\u5b57\u53ca\u5176\u4e0b\u6807\uff0c\u65f6\u95f4\u590d\u6742\u5ea6<code>O(n)<\/code><\/li>\n<\/ul>\n<h1>Java<\/h1>\n<pre><code class=\"language-java line-numbers\">public int[] twoSum(int[] nums, int target) {\n    HashMap&lt;Integer, Integer&gt; m = new HashMap&lt;&gt;();\n    for (int i = 0; i &lt; nums.length; i++) {\n        int current = nums[i];\n        if (m.get(target - current) != null) {\n            return new int[]{i, m.get(target - current)};\n        }\n        m.put(current, i);\n    }\n    return new int[]{};\n}\n<\/code><\/pre>\n<h1>Kotlin<\/h1>\n<pre><code class=\"language-kotlin line-numbers\">fun twoSum(nums: IntArray, target: Int): IntArray {\n    val map = HashMap&lt;Int, Int&gt;()\n    for (i in nums.indices) {\n        val cur = nums[i]\n        if (map[target - cur] != null) {\n            return intArrayOf(i, map[target - cur]!!)\n        }\n        map[cur] = i\n    }\n    return intArrayOf()\n}\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"<p>\u9898\u76ee\u63cf\u8ff0 \u7ed9\u5b9a\u4e00\u4e2a\u6574\u6570\u6570\u7ec4 nums \u548c\u4e00\u4e2a\u6574\u6570\u76ee\u6807\u503c target\uff0c\u8bf7\u4f60\u5728\u8be5\u6570\u7ec4\u4e2d\u627e\u51fa \u548c\u4e3a\u76ee\u6807\u503c targ [&hellip;]<\/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":[20,74,73],"class_list":["post-855","post","type-post","status-publish","format-standard","hentry","category-algo","tag-leetcode","tag-74","tag-73"],"_links":{"self":[{"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/posts\/855","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=855"}],"version-history":[{"count":2,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/posts\/855\/revisions"}],"predecessor-version":[{"id":859,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/posts\/855\/revisions\/859"}],"wp:attachment":[{"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=855"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=855"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=855"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}