{"id":2705,"date":"2020-01-10T13:35:17","date_gmt":"2020-01-10T05:35:17","guid":{"rendered":"http:\/\/www.sniper97.cn\/?p=2705"},"modified":"2020-01-10T13:35:17","modified_gmt":"2020-01-10T05:35:17","slug":"%e3%80%90leetcode%e3%80%910004%e5%af%bb%e6%89%be%e4%b8%a4%e4%b8%aa%e6%9c%89%e5%ba%8f%e6%95%b0%e7%bb%84%e7%9a%84%e4%b8%ad%e4%bd%8d%e6%95%b0","status":"publish","type":"post","link":"http:\/\/www.sniper97.cn\/index.php\/note\/algorithm\/2705\/","title":{"rendered":"\u3010LeetCode\u30110004\u5bfb\u627e\u4e24\u4e2a\u6709\u5e8f\u6570\u7ec4\u7684\u4e2d\u4f4d\u6570"},"content":{"rendered":"\n

https:\/\/leetcode-cn.com\/problems\/median-of-two-sorted-arrays\/<\/a><\/p>\n\n\n

\u4ee3\u7801\uff1a<\/p>\n\n\n

# -*- coding:utf-8 -*-
class Solution(object):
    def findMedianSortedArrays(self, nums1, nums2):
        \"\"\"
<\/em>        <\/em>:type<\/em><\/strong> nums1: List[int]
<\/em>        <\/em>:type<\/em><\/strong> nums2: List[int]
<\/em>        <\/em>:rtype<\/em><\/strong>: float
<\/em>        \"\"\"
<\/em>
<\/em>        <\/em>def findKthElement(arr1, arr2, k):
            \"\"\"
<\/em>            <\/em>\u5bfb\u627e\u7b2c<\/em>k<\/em>\u4e2a\u5143\u7d20
<\/em>            <\/em>:param<\/em><\/strong> nums1:
<\/em>            <\/em>:param<\/em><\/strong> nums2:
<\/em>            <\/em>:param<\/em><\/strong> k:
<\/em>            <\/em>:return<\/em><\/strong>:
<\/em>            \"\"\"
<\/em>            <\/em>l1, l2 = len(arr1), len(arr2)
            if l1 > l2:
                return findKthElement(arr2, arr1, k)
            if not arr1:
                return arr2[k - 1]
            if k == 1:
                return min(arr1[0], arr2[0])
            value1 = min(k \/\/ 2, l1) - 1
            value2 = min(k \/\/ 2, l2) - 1
            if arr1[value1] > arr2[value2]:
                return findKthElement(arr1, arr2[value2 + 1:], k - value2 - 1)
            else:
                return findKthElement(arr1[value1 + 1:], arr2, k - value1 - 1)

        ll1, ll2 = len(nums1), len(nums2)
        left, right = (ll1 + ll2 + 1) \/\/ 2, (ll1 + ll2 + 2) \/\/ 2
        return (findKthElement(nums1, nums2, left) + findKthElement(nums1, nums2, right)) \/ 2.0


if __name__ == '__main__':
    nums1 = [1, 3]
    nums2 = [2]
    print(Solution().findMedianSortedArrays(nums1, nums2))
<\/pre>\n\n\n
\u601d\u8def\uff1a<\/strong>\u4e00\u822c\u8fd9\u79cd\u9898\u505a\u6cd5\u8fd8\u662f\u6bd4\u8f83\u7b80\u5355\u7684\uff0c\u4f9d\u6b21\u904d\u5386\u4e24\u4e2a\u5217\u8868\u5c31\u53ef\u4ee5\u627e\u5230\u4e2d\u4f4d\u6570\uff0c\u590d\u6742\u5ea6\u5728O(m+n)\uff0c\u4f46\u662f\u8fd9\u9053\u9898\u9650\u5236\u5728log\uff08m+n\uff09\u7684\u65f6\u95f4\u5185\u5b8c\u6210\uff0c\u6240\u4ee5\u9700\u8981\u4f7f\u7528\u4e8c\u5206\u67e5\u627e\u3002\u6211\u4eec\u5bf9\u6bcf\u4e2a\u5217\u8868\u68c0\u67e5\u7b2ck\/2\u4f4d\uff08k\u4e3a\u4e2d\u4f4d\u6570\u4e0b\u6807\uff09\uff0c\u5bf9\u4e8e\u8f83\u5c0f\u7684\u90a3\u4e2a\u5217\u8868\uff0c\u6211\u4eec\u53ef\u4ee5\u786e\u5b9a\u524dk\/2\u4e2a\u6570\u90fd\u4e0d\u4f1a\u662f\u4e2d\u4f4d\u6570\uff0c\u56e0\u6b64\u53ef\u4ee5\u5c06\u524dk\/2\u4e2a\u6570\u6574\u4f53\u5220\u6389\u7ee7\u7eed\u9012\u5f52\u3002<\/p>\n\n\n
\u8fb9\u754c\u6761\u4ef6\u5c31\u662f\u5176\u4e2d\u4e00\u4e2a\u5217\u8868\u88ab\u5220\u5b8c\u4e86\u6216\u8005\u9700\u8981\u53d6\u6700\u5c0f\u7684\u5143\u7d20\uff0c\u53ea\u987b\u6bd4\u8f83\u4e00\u4e0b\u4e24\u4e2a\u5217\u8868\u76840\u53f7\u5143\u7d20\u8f93\u51fa\u5373\u53ef\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
https:\/\/leetcode-cn.com\/problems\/median-of-two-sor […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_mi_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"footnotes":""},"categories":[10],"tags":[],"views":1331,"_links":{"self":[{"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/posts\/2705"}],"collection":[{"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/comments?post=2705"}],"version-history":[{"count":0,"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/posts\/2705\/revisions"}],"wp:attachment":[{"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/media?parent=2705"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/categories?post=2705"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/www.sniper97.cn\/index.php\/wp-json\/wp\/v2\/tags?post=2705"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}