{"id":1025,"date":"2025-12-24T03:40:37","date_gmt":"2025-12-23T19:40:37","guid":{"rendered":"https:\/\/www.guanhaobo.cn\/?p=1025"},"modified":"2025-12-24T03:40:37","modified_gmt":"2025-12-23T19:40:37","slug":"leetcode-45-%e8%b7%b3%e8%b7%83%e6%b8%b8%e6%88%8f-ii","status":"publish","type":"post","link":"https:\/\/www.guanhaobo.cn\/?p=1025","title":{"rendered":"LeetCode 45 \u2013 \u8df3\u8dc3\u6e38\u620f II"},"content":{"rendered":"

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

\u7ed9\u5b9a\u4e00\u4e2a\u957f\u5ea6\u4e3a n \u7684 0 \u7d22\u5f15\u6574\u6570\u6570\u7ec4 nums\u3002\u521d\u59cb\u4f4d\u7f6e\u5728\u4e0b\u6807 0\u3002
\n\u6bcf\u4e2a\u5143\u7d20 nums[i] \u8868\u793a\u4ece\u7d22\u5f15 i \u5411\u540e\u8df3\u8f6c\u7684\u6700\u5927\u957f\u5ea6\u3002\u6362\u53e5\u8bdd\u8bf4\uff0c\u5982\u679c\u4f60\u5728\u7d22\u5f15 i \u5904\uff0c\u4f60\u53ef\u4ee5\u8df3\u8f6c\u5230\u4efb\u610f (i + j) \u5904\uff1a
\n0 <= j <= nums[i] \u4e14
\ni + j < n
\n\u8fd4\u56de\u5230\u8fbe n – 1 \u7684\u6700\u5c0f\u8df3\u8dc3\u6b21\u6570\u3002\u6d4b\u8bd5\u7528\u4f8b\u4fdd\u8bc1\u53ef\u4ee5\u5230\u8fbe n – 1\u3002<\/p>\n

\u793a\u4f8b\uff1a
\n\u8f93\u5165: nums = [2,3,1,1,4]
\n\u8f93\u51fa: 2<\/p>\n

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

\u8bb0\u5f55\u5f53\u524d\u6b65\u6570\u53ef\u8df3\u8dc3\u7684\u6700\u5927\u8fb9\u754c right\u3002
\n\u6bcf\u6b21\u5411\u53f3\u79fb\u52a8\u4e00\u4f4d\uff0c\u8fc7\u7a0b\u4e2d\u7ef4\u62a4\u4e0b\u4e00\u6b21\u8df3\u8dc3\u7684\u6700\u5927\u8fb9\u754c nextRight\u3002
\n\u5f53 index > right \u65f6\uff0c\u8bf4\u660e\u8fdb\u5165\u4e86\u4e0b\u4e00\u6b65\uff0ccount++\uff1b<\/p>\n

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

Java<\/h1>\n
public int jump(int[] nums) {\n    int count = 0;\n    int right = 0;\n    int nextRight = 0;\n    for (int i = 0; i < nums.length; i++) {\n        if (i > right) {\n            count++;\n            right = nextRight;\n        }\n        nextRight = Math.max(nextRight, i + nums[i]);\n    }\n    return count;\n}\n<\/code><\/pre>\n
Kotlin<\/h1>\n
fun jump(nums: IntArray): Int {\n    var count = 0\n    var right = 0\n    var nextRight = 0\n    for (i in nums.indices) {\n        if (i > right) {\n            count++\n            right = nextRight\n        }\n        nextRight = max(nextRight, nums[i] + i)\n    }\n    return count\n}\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
\u9898\u76ee\u63cf\u8ff0 \u7ed9\u5b9a\u4e00\u4e2a\u957f\u5ea6\u4e3a n \u7684 0 \u7d22\u5f15\u6574\u6570\u6570\u7ec4 nums\u3002\u521d\u59cb\u4f4d\u7f6e\u5728\u4e0b\u6807 0\u3002 \u6bcf\u4e2a\u5143\u7d20 nums[i]  […]<\/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":[20,62],"class_list":["post-1025","post","type-post","status-publish","format-standard","hentry","category-algo","tag-leetcode","tag-62"],"_links":{"self":[{"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/posts\/1025","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=1025"}],"version-history":[{"count":1,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/posts\/1025\/revisions"}],"predecessor-version":[{"id":1026,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/posts\/1025\/revisions\/1026"}],"wp:attachment":[{"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1025"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1025"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1025"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}