{"id":682,"date":"2020-06-22T14:34:07","date_gmt":"2020-06-22T06:34:07","guid":{"rendered":"http:\/\/www.guanhaobo.cn\/?p=682"},"modified":"2020-06-22T14:34:07","modified_gmt":"2020-06-22T06:34:07","slug":"jz6-%e6%97%8b%e8%bd%ac%e6%95%b0%e7%bb%84%e7%9a%84%e6%9c%80%e5%b0%8f%e6%95%b0%e5%ad%97","status":"publish","type":"post","link":"https:\/\/www.guanhaobo.cn\/?p=682","title":{"rendered":"JZ6 \u2014 \u65cb\u8f6c\u6570\u7ec4\u7684\u6700\u5c0f\u6570\u5b57"},"content":{"rendered":"

\u9898\u76ee\u63cf\u8ff0<\/h3>\n

\u628a\u4e00\u4e2a\u6570\u7ec4\u6700\u5f00\u59cb\u7684\u82e5\u5e72\u4e2a\u5143\u7d20\u642c\u5230\u6570\u7ec4\u7684\u672b\u5c3e\uff0c\u6211\u4eec\u79f0\u4e4b\u4e3a\u6570\u7ec4\u7684\u65cb\u8f6c\u3002
\n\u8f93\u5165\u4e00\u4e2a\u975e\u9012\u51cf\u6392\u5e8f\u7684\u6570\u7ec4\u7684\u4e00\u4e2a\u65cb\u8f6c\uff0c\u8f93\u51fa\u65cb\u8f6c\u6570\u7ec4\u7684\u6700\u5c0f\u5143\u7d20\u3002
\n\u4f8b\u5982\u6570\u7ec4{3,4,5,1,2}\u4e3a{1,2,3,4,5}\u7684\u4e00\u4e2a\u65cb\u8f6c\uff0c\u8be5\u6570\u7ec4\u7684\u6700\u5c0f\u503c\u4e3a1\u3002
\nNOTE\uff1a\u7ed9\u51fa\u7684\u6240\u6709\u5143\u7d20\u90fd\u5927\u4e8e0\uff0c\u82e5\u6570\u7ec4\u5927\u5c0f\u4e3a0\uff0c\u8bf7\u8fd4\u56de0\u3002<\/p>\n

\u9898\u76ee\u5206\u6790<\/h3>\n

\u9898\u76ee\u7684\u8868\u8ff0\u6709\u70b9\u4e0d\u6e05\u695a\uff0c\u201c\u975e\u9012\u51cf\u6392\u5e8f\u7684\u6570\u7ec4\u201d\u6307\u7684\u662f\u9664\u4e86\u9012\u51cf\u6570\u7ec4\u4e4b\u5916\u7684\u6240\u6709\u6570\u7ec4\uff08\u5305\u62ec\u4e71\u5e8f\uff09\uff0c\u8fd8\u662f\u6307\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u90fd\u4e0d\u5c0f\u4e8e\u5b83\u7684\u524d\u4e00\u4e2a\u5143\u7d20\uff1f
\n\u8fd9\u91cc\u7684\u610f\u601d\u5e94\u8be5\u662f\u7b2c\u4e8c\u79cd\uff0c\u5373\u6570\u7ec4\u4e2d\u7684\u6bcf\u4e2a\u5143\u7d20\u90fd\u4e0d\u5c0f\u4e8e\u5b83\u7684\u524d\u4e00\u4e2a\u5143\u7d20\u3002
\n\u5bf9\u975e\u9012\u51cf\u6570\u7ec4\u8fdb\u884c\u65cb\u8f6c\u64cd\u4f5c\uff0c\u8981\u627e\u51fa\u6570\u7ec4\u4e2d\u7684\u6700\u5c0f\u503c\u3002
\n\u76f4\u63a5\u904d\u5386\u4e00\u4e0b\u5c31\u89e3\u51b3\u4e86\uff0c\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO(n)<\/code>\uff0c\u4f46\u8fd9\u6837\u80af\u5b9a\u4e0d\u662f\u6700\u4f73\u89e3\u51b3\u65b9\u6cd5\u3002<\/p>\n

\u5bf9\u4e8e\u6709\u5e8f\u6570\u636e\u7684\u67e5\u627e\uff0c\u5927\u5bb6\u90fd\u77e5\u9053\u8981\u4f7f\u7528\u4e8c\u5206\u67e5\u627e\u3002\u90a3\u4e48\u8fd9\u4e2a\u95ee\u9898\u662f\u4e0d\u662f\u4e5f\u53ef\u4ee5\u4f7f\u7528\u4e8c\u5206\u7684\u601d\u60f3\u5462\uff1f
\n\u4f46\u6211\u4eec\u4f1a\u53d1\u73b0\uff0c\u53d6\u51fa\u4e2d\u95f4\u4f4d\u7f6emid<\/code>\u5bf9\u5e94\u7684\u503c\u540e\uff0c\u4e0d\u77e5\u9053\u8be5\u548c\u8c01\u8fdb\u884c\u6bd4\u8f83\u4e86\uff0c\u5373\u7f3a\u5c11\u4e00\u4e2a\u76ee\u6807\u503ctarget<\/code>\u3002
\n\u4e0d\u59a8\u5c31\u8ba9\u53f3\u8fb9\u754c\u5bf9\u5e94\u7684\u503c\u4f5c\u4e3a\u76ee\u6807\u503ctarget<\/code>\u3002
\n1. rotateArray[mid] > target<\/code>\u65f6\uff0c\u8bf4\u660emid<\/code>\u548cmid<\/code>\u5de6\u8fb9\u7684\u503c\u80af\u5b9a\u4e0d\u662f\u6700\u5c0f\u503c\uff0c\u56e0\u6b64\u53ef\u4ee5\u4ee4\u5de6\u8fb9\u754cleft = mid + 1<\/code>\uff1b
\n2. rotateArray[mid] < target<\/code>\u65f6\uff0c\u8bf4\u660emid<\/code>\u53f3\u8fb9\u7684\u503c\u80af\u5b9a\u4e0d\u662f\u6700\u5c0f\u503c\uff0c\u56e0\u6b64\u53ef\u4ee5\u4ee4\u53f3\u8fb9\u754cright = mid<\/code>\uff1b
\n3. rotateArray[mid] == target<\/code>\u65f6\uff0c\u8bf4\u660erotateArray[mid]<\/code>\u6709\u53ef\u80fd\u662f\u6700\u5c0f\u503c\uff08\u4f8b\u59822 3 1 1 1<\/code>\uff09\uff0c\u4e5f\u6709\u53ef\u80fd\u4e0d\u662f\u6700\u5c0f\u503c\uff08\u4f8b\u59821 1 1 0 1<\/code>\uff09\uff0c\u4e0d\u8fc7\u53ef\u4ee5\u80af\u5b9a\u7684\u662f\uff0c\u6b64\u65f6\u7684\u53f3\u8fb9\u754c\u5df2\u7ecf\u65e0\u7528\u4e86\uff0c\u56e0\u6b64\u4ee4\u53f3\u8fb9\u754cright--<\/code>\u3002<\/p>\n

\u6700\u7ec8\uff0c\u5f53\u5faa\u73af\u7ed3\u675f\u65f6\uff0crotateArray[mid]<\/code>\u5c31\u662f\u7b54\u6848\u3002
\n\u5f53\u7136\uff0c\u4e5f\u53ef\u4ee5\u8ba9\u5de6\u8fb9\u754c\u5bf9\u5e94\u7684\u503c\u4f5c\u4e3a\u76ee\u6807\u503ctarget<\/code>\uff0c\u5bf9\u5e94\u7684\u5224\u65ad\u65b9\u6cd5\u505a\u51fa\u76f8\u5e94\u6539\u53d8\u5373\u53ef\u3002
\n\u7efc\u4e0a\u6240\u8ff0\uff0c\u65f6\u95f4\u590d\u6742\u5ea6\u4e3aO(log(n))<\/code>\uff0c\u6700\u574f\u4e3aO(n)<\/code>\u3002<\/p>\n

C++<\/h3>\n
class Solution\n{\npublic:\n    int minNumberInRotateArray(vector<int> rotateArray)\n    {\n        if (rotateArray.size() == 0)\n            return 0;\n        int left = 0, right = rotateArray.size() - 1, mid;\n        while (left <= right)\n        {\n            mid = left + (right - left) \/ 2;\n            int target = rotateArray[right];\n            if (rotateArray[mid] > target)\n                left = mid + 1;\n            else if (rotateArray[mid] < target)\n                right = mid;\n            else\n                right--;\n        }\n        return rotateArray[mid];\n    }\n};\n<\/code><\/pre>\n
Java<\/h3>\n
import java.util.ArrayList;\npublic class Solution {\n    public int minNumberInRotateArray(int[] array) {\n        if (array.length == 0)\n            return 0;\n        int left = 0, right = array.length - 1, mid = 0;\n        while (left <= right) {\n            mid = left + (right - left) \/ 2;\n            int target = array[right];\n            if (array[mid] > target)\n                left = mid + 1;\n            else if (array[mid] < target)\n                right = mid;\n            else\n                right--;\n        }\n        return array[mid];\n    }\n}\n<\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"
\u9898\u76ee\u63cf\u8ff0 \u628a\u4e00\u4e2a\u6570\u7ec4\u6700\u5f00\u59cb\u7684\u82e5\u5e72\u4e2a\u5143\u7d20\u642c\u5230\u6570\u7ec4\u7684\u672b\u5c3e\uff0c\u6211\u4eec\u79f0\u4e4b\u4e3a\u6570\u7ec4\u7684\u65cb\u8f6c\u3002 \u8f93\u5165\u4e00\u4e2a\u975e\u9012\u51cf\u6392\u5e8f\u7684\u6570\u7ec4\u7684\u4e00\u4e2a\u65cb […]<\/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":[39],"class_list":["post-682","post","type-post","status-publish","format-standard","hentry","category-algo","tag-offer"],"_links":{"self":[{"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/posts\/682","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=682"}],"version-history":[{"count":0,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=\/wp\/v2\/posts\/682\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=682"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=682"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.guanhaobo.cn\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=682"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}