{"id":735,"date":"2020-09-26T11:15:58","date_gmt":"2020-09-26T03:15:58","guid":{"rendered":"http:\/\/39.96.58.60\/?p=735"},"modified":"2022-10-18T16:37:28","modified_gmt":"2022-10-18T08:37:28","slug":"leetcode-1024-%e8%a7%86%e9%a2%91%e6%8b%bc%e6%8e%a5","status":"publish","type":"post","link":"http:\/\/www.yatenglg.cn\/blog\/?p=735","title":{"rendered":"Leetcode 1024. \u89c6\u9891\u62fc\u63a5"},"content":{"rendered":"<p>\u4f60\u5c06\u4f1a\u83b7\u5f97\u4e00\u7cfb\u5217\u89c6\u9891\u7247\u6bb5\uff0c\u8fd9\u4e9b\u7247\u6bb5\u6765\u81ea\u4e8e\u4e00\u9879\u6301\u7eed\u65f6\u957f\u4e3a&nbsp;<code>T<\/code>&nbsp;\u79d2\u7684\u4f53\u80b2\u8d5b\u4e8b\u3002\u8fd9\u4e9b\u7247\u6bb5\u53ef\u80fd\u6709\u6240\u91cd\u53e0\uff0c\u4e5f\u53ef\u80fd\u957f\u5ea6\u4e0d\u4e00\u3002<\/p>\n<p>\u89c6\u9891\u7247\u6bb5&nbsp;<code>clips[i]<\/code>&nbsp;\u90fd\u7528\u533a\u95f4\u8fdb\u884c\u8868\u793a\uff1a\u5f00\u59cb\u4e8e&nbsp;<code>clips[i][0]<\/code>&nbsp;\u5e76\u4e8e&nbsp;<code>clips[i][1]<\/code>&nbsp;\u7ed3\u675f\u3002\u6211\u4eec\u751a\u81f3\u53ef\u4ee5\u5bf9\u8fd9\u4e9b\u7247\u6bb5\u81ea\u7531\u5730\u518d\u526a\u8f91\uff0c\u4f8b\u5982\u7247\u6bb5&nbsp;<code>[0, 7]<\/code>&nbsp;\u53ef\u4ee5\u526a\u5207\u6210&nbsp;<code>[0, 1] +&nbsp;[1, 3] + [3, 7]<\/code>&nbsp;\u4e09\u90e8\u5206\u3002<\/p>\n<p>\u6211\u4eec\u9700\u8981\u5c06\u8fd9\u4e9b\u7247\u6bb5\u8fdb\u884c\u518d\u526a\u8f91\uff0c\u5e76\u5c06\u526a\u8f91\u540e\u7684\u5185\u5bb9\u62fc\u63a5\u6210\u8986\u76d6\u6574\u4e2a\u8fd0\u52a8\u8fc7\u7a0b\u7684\u7247\u6bb5\uff08<code>[0, T]<\/code>\uff09\u3002\u8fd4\u56de\u6240\u9700\u7247\u6bb5\u7684\u6700\u5c0f\u6570\u76ee\uff0c\u5982\u679c\u65e0\u6cd5\u5b8c\u6210\u8be5\u4efb\u52a1\uff0c\u5219\u8fd4\u56de&nbsp;<code>-1<\/code> \u3002<\/p>\n<p><strong>\u793a\u4f8b 1\uff1a<\/strong><\/p>\n<pre><strong>\u8f93\u5165\uff1a<\/strong>clips = [[0,2],[4,6],[8,10],[1,9],[1,5],[5,9]], T = 10\n\n<strong>\u8f93\u51fa\uff1a<\/strong>3\n\n<strong>\u89e3\u91ca\uff1a<\/strong>\n\n\u6211\u4eec\u9009\u4e2d [0,2], [8,10], [1,9] \u8fd9\u4e09\u4e2a\u7247\u6bb5\u3002\n\n\u7136\u540e\uff0c\u6309\u4e0b\u9762\u7684\u65b9\u6848\u91cd\u5236\u6bd4\u8d5b\u7247\u6bb5\uff1a\n\n\u5c06 [1,9] \u518d\u526a\u8f91\u4e3a [1,2] + [2,8] + [8,9] \u3002\n\n\u73b0\u5728\u6211\u4eec\u624b\u4e0a\u6709 [0,2] + [2,8] + [8,10]\uff0c\u800c\u8fd9\u4e9b\u6db5\u76d6\u4e86\u6574\u573a\u6bd4\u8d5b [0, 10]\u3002\n\n<\/pre>\n<p><strong>\u793a\u4f8b 2\uff1a<\/strong><\/p>\n<pre><strong>\u8f93\u5165\uff1a<\/strong>clips = [[0,1],[1,2]], T = 5\n\n<strong>\u8f93\u51fa\uff1a<\/strong>-1\n\n<strong>\u89e3\u91ca\uff1a<\/strong>\n\n\u6211\u4eec\u65e0\u6cd5\u53ea\u7528 [0,1] \u548c [1,2] \u8986\u76d6 [0,5] \u7684\u6574\u4e2a\u8fc7\u7a0b\u3002\n\n<\/pre>\n<p><strong>\u793a\u4f8b 3\uff1a<\/strong><\/p>\n<pre><strong>\u8f93\u5165\uff1a<\/strong>clips = [[0,1],[6,8],[0,2],[5,6],[0,4],[0,3],[6,7],[1,3],[4,7],[1,4],[2,5],[2,6],[3,4],[4,5],[5,7],[6,9]], T = 9\n\n<strong>\u8f93\u51fa\uff1a<\/strong>3\n\n<strong>\u89e3\u91ca\uff1a <\/strong>\n\n\u6211\u4eec\u9009\u53d6\u7247\u6bb5 [0,4], [4,7] \u548c [6,9] \u3002\n\n<\/pre>\n<p><strong>\u793a\u4f8b 4\uff1a<\/strong><\/p>\n<pre><strong>\u8f93\u5165\uff1a<\/strong>clips = [[0,4],[2,8]], T = 5\n\n<strong>\u8f93\u51fa\uff1a<\/strong>2\n\n<strong>\u89e3\u91ca\uff1a<\/strong>\n\n\u6ce8\u610f\uff0c\u4f60\u53ef\u80fd\u5f55\u5236\u8d85\u8fc7\u6bd4\u8d5b\u7ed3\u675f\u65f6\u95f4\u7684\u89c6\u9891\u3002\n\n<\/pre>\n<p><strong>\u63d0\u793a\uff1a<\/strong><\/p>\n<ul>\n<li><code>1 &lt;= clips.length &lt;= 100<\/code><\/li>\n<li><code>0 &lt;= clips[i][0] &lt;=&nbsp;clips[i][1] &lt;= 100<\/code><\/li>\n<li><code>0 &lt;= T &lt;= 100<\/code><\/li>\n<\/ul>\n<p>**\u96be\u5ea6**: Medium<\/p>\n<p>**\u6807\u7b7e**: \u52a8\u6001\u89c4\u5212\u3001<\/p>\n<div class=\"hcb_wrap\">\n<pre class=\"prism undefined-numbers lang-python\" data-lang=\"Python\"><code>\n# -*- coding: utf-8 -*-\n# @Author  : LG\n\n\"\"\"\n\u6267\u884c\u7528\u65f6\uff1a28 ms, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8698.92% \u7684\u7528\u6237\n\u5185\u5b58\u6d88\u8017\uff1a13.5 MB, \u5728\u6240\u6709 Python3 \u63d0\u4ea4\u4e2d\u51fb\u8d25\u4e8632.75% \u7684\u7528\u6237\n\n\u89e3\u9898\u601d\u8def\uff1a\n    \u52a8\u6001\u89c4\u5212\n    \u5177\u4f53\u5b9e\u73b0\u89c1\u4ee3\u7801\u6ce8\u91ca\n\"\"\"\nclass Solution:\n    def videoStitching(self, clips: List[List[int]], T: int) -&gt; int:\n        clips.sort()\n        dp = [float('inf')] * (T+1) # \u526a\u5207\u5230\u5f53\u524d\u4f4d\u7f6e\u6240\u9700\u7684\u6700\u5c0f\u6b21\u6570\n        dp[0] = 0\n        for clip in clips:\n            start, end = clip[0], clip[1]   # \u6bcf\u4e2a\u7247\u6bb5\u8d77\u59cb\u4e0e\u7ed3\u5c3e\n            for i in range(start, end+1):\n                if i &gt; T:   # \u5f53\u524d\u7247\u6bb5\u7ed3\u5c3e\u53ef\u80fd\u8d85\u51fa\u6240\u9700\u957f\u5ea6\n                    break\n                dp[i] = min(dp[start]+1, dp[i]) # \u5f53\u524d\u7247\u6bb5\uff0c\u6700\u5c0f\u6b21\u6570\u4e3a\u8d77\u59cb\u5904\u7684\u6b21\u6570+1\n        if dp[-1] == float('inf'):\n            return -1\n        else:\n            return int(dp[-1])<\/code><\/pre>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>\u4f60\u5c06\u4f1a\u83b7\u5f97\u4e00\u7cfb\u5217\u89c6\u9891\u7247\u6bb5\uff0c\u8fd9\u4e9b\u7247\u6bb5\u6765\u81ea\u4e8e\u4e00\u9879\u6301\u7eed\u65f6\u957f\u4e3a&nbsp;T&nbsp;\u79d2\u7684\u4f53\u80b2\u8d5b\u4e8b\u3002\u8fd9\u4e9b\u7247\u6bb5\u53ef\u80fd\u6709\u6240&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":[],"categories":[11,1],"tags":[],"_links":{"self":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/735"}],"collection":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=735"}],"version-history":[{"count":1,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/735\/revisions"}],"predecessor-version":[{"id":736,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=\/wp\/v2\/posts\/735\/revisions\/736"}],"wp:attachment":[{"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=735"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=735"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.yatenglg.cn\/blog\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=735"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}