{"id":988,"date":"2025-12-16T16:04:02","date_gmt":"2025-12-16T08:04:02","guid":{"rendered":"https:\/\/www.guanhaobo.cn\/?p=988"},"modified":"2025-12-16T16:04:02","modified_gmt":"2025-12-16T08:04:02","slug":"leetcode-34-%e5%9c%a8%e6%8e%92%e5%ba%8f%e6%95%b0%e7%bb%84%e4%b8%ad%e6%9f%a5%e6%89%be%e5%85%83%e7%b4%a0%e7%9a%84%e7%ac%ac%e4%b8%80%e4%b8%aa%e5%92%8c%e6%9c%80%e5%90%8e%e4%b8%80%e4%b8%aa%e4%bd%8d","status":"publish","type":"post","link":"https:\/\/www.guanhaobo.cn\/?p=988","title":{"rendered":"LeetCode 34 – \u5728\u6392\u5e8f\u6570\u7ec4\u4e2d\u67e5\u627e\u5143\u7d20\u7684\u7b2c\u4e00\u4e2a\u548c\u6700\u540e\u4e00\u4e2a\u4f4d\u7f6e"},"content":{"rendered":"

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

\u7ed9\u4f60\u4e00\u4e2a\u6309\u7167\u975e\u9012\u51cf\u987a\u5e8f\u6392\u5217\u7684\u6574\u6570\u6570\u7ec4 nums\uff0c\u548c\u4e00\u4e2a\u76ee\u6807\u503c target\u3002\u8bf7\u4f60\u627e\u51fa\u7ed9\u5b9a\u76ee\u6807\u503c\u5728\u6570\u7ec4\u4e2d\u7684\u5f00\u59cb\u4f4d\u7f6e\u548c\u7ed3\u675f\u4f4d\u7f6e\u3002
\n\u5982\u679c\u6570\u7ec4\u4e2d\u4e0d\u5b58\u5728\u76ee\u6807\u503c target\uff0c\u8fd4\u56de [-1, -1]\u3002
\n\u4f60\u5fc5\u987b\u8bbe\u8ba1\u5e76\u5b9e\u73b0\u65f6\u95f4\u590d\u6742\u5ea6\u4e3a O(log n) \u7684\u7b97\u6cd5\u89e3\u51b3\u6b64\u95ee\u9898\u3002<\/p>\n

\u793a\u4f8b\uff1a
\n\u8f93\u5165\uff1anums = [5,7,7,8,8,10], target = 8
\n\u8f93\u51fa\uff1a[3,4]<\/p>\n

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

\u4e24\u6b21\u4e8c\u5206\u67e5\u627e\u3002
\n\u67e5\u627e first \u65f6\uff0c\u627e\u5230\u76ee\u6807\u503c\u540e\u8ba9 right = mid – 1\uff1b
\n\u67e5\u627e last \u65f6\uff0c\u627e\u5230\u76ee\u6807\u503c\u540e\u8ba9 left = mid + 1\uff1b<\/p>\n

Java<\/h1>\n
public int[] searchRange(int[] nums, int target) {\n    int left = 0, right = nums.length - 1;\n    int first = -1;\n    while (left <= right) {\n        int mid = (left + right) \/ 2;\n        if (nums[mid] < target) {\n            left = mid + 1;\n        } else if (nums[mid] > target) {\n            right = mid - 1;\n        } else {\n            first = mid;\n            right = mid - 1;\n        }\n    }\n\n    int last = -1;\n    left = 0;\n    right = nums.length - 1;\n    while (left <= right) {\n        int mid = (left + right) \/ 2;\n        if (nums[mid] < target) {\n            left = mid + 1;\n        } else if (nums[mid] > target) {\n            right = mid - 1;\n        } else {\n            last = mid;\n            left = mid + 1;\n        }\n    }\n\n    return new int[]{first, last};\n}\n<\/code><\/pre>\n
Kotlin<\/h1>\n
fun searchRange(nums: IntArray, target: Int): IntArray {\n    var first = -1\n    var left = 0\n    var right = nums.size - 1\n    while (left <= right) {\n        val mid = (left + right) \/ 2\n        if (nums[mid] < target) {\n            left = mid + 1\n        } else if (nums[mid] > target) {\n            right = mid - 1\n        } else {\n            first = mid\n            right = mid - 1\n        }\n    }\n\n    var last = -1\n    left = 0\n    right = nums.size - 1\n    while (left <= right) {\n        val mid = (left + right) \/ 2\n        if (nums[mid] < target) {\n            left = mid + 1\n        } else if (nums[mid] > target) {\n            right = mid - 1\n        } else {\n            last = mid\n            left = mid + 1\n        }\n    }\n\n    return intArrayOf(first, last)\n}\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
\u9898\u76ee\u63cf\u8ff0 \u7ed9\u4f60\u4e00\u4e2a\u6309\u7167\u975e\u9012\u51cf\u987a\u5e8f\u6392\u5217\u7684\u6574\u6570\u6570\u7ec4 nums\uff0c\u548c\u4e00\u4e2a\u76ee\u6807\u503c target\u3002\u8bf7\u4f60\u627e\u51fa\u7ed9\u5b9a\u76ee\u6807\u503c\u5728\u6570\u7ec4 […]<\/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":[20,32],"class_list":["post-988","post","type-post","status-publish","format-standard","hentry","category-algo","tag-leetcode","tag-32"],"_links":{"self":[{"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/posts\/988","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=988"}],"version-history":[{"count":1,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/posts\/988\/revisions"}],"predecessor-version":[{"id":989,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/posts\/988\/revisions\/989"}],"wp:attachment":[{"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=988"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=988"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=988"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}