There are two sorted arrays nums1 and nums2 of size m and n respectively.
Find the median of the two sorted arrays. The overall run time complexity should be O(log (m+n)).
分析:给定两个已经排好序的数组nums1和nums2,求两个数组的中值,时间复杂度为O(log(m+n))
[]
[1]
=>1.00000
[1,1]
[1,2]
=>1.00000
[2,5,8]
[1,3,6]
=> 4.00000
[2,5,8,9]
[1,3,6,7]
=> 5.50000
public double findMedianSortedArrays(int[] nums1, int[] nums2) { int len = nums1.length + nums2.length; int[] nums = new int[len]; int i=0; for( ; i<nums1.length; i++) nums[i] = nums1[i]; for(int j=0; j<nums2.length; j++,i++) nums[i] = nums2[j]; Arrays.sort(nums); //System.out.println(Arrays.toString(nums) + "-- len:"+len+"--len/2:"+(len/2)); return len%2==0? ((nums[len/2]+nums[len/2-1])/(2 * 1.0)):(nums[len/2]*1.0) ; }
解:需要把两个数组合并成一个数组,并重新排序