优化3:将merge()函数中:循环里头的aux[]和a[]互换位置,第一个sort()函数中:sort(), merge()里的aux,a互换位置。这样可以save time(but not space) 2. Merge sort(non-recursive、buttom-up) 思路: 遍历整个array,将size=1的subarray合并起来 再重头开始,不断重复size=2,4,8,16... Java implementation...
Recursive Merge sort algorithm implemented in Java package com.javabrahman.algorithms.sorts; public class MergeSort { static int inputArray[] = { 10, 5, 100, 1,10000}; public static int[] doMergeSort(int[] values) { if(values.length<=1){ return values; } int mid=(values.length)/2;...
we can move ahead with the implementation of the merge sort algorithm in the Java programming language. But before that, we should have a look at the Pseudo-code of the process.Though we have discussed the steps required in the merge sort algorithm process in a good manner, still...
Merge sort in action ThemergeStep of Merge Sort Every recursive algorithm is dependent on a base case and the ability to combine the results from base cases. Merge sort is no different. The most important part of the merge sort algorithm is, you guessed it,mergestep. The merge step is th...
//自然排序算法不执行合并,而算法mergesort需执行[logn]次合并。 * * */ #ifndef MERGESORT_UNRECURSIVE_ #define MERGESORT_UNRECURSIVE_ #include<stdio.h> void mergesort_unrecursive(int* a, const int n); void print(int const * a, const int n); ...
* Merge Sort---Divide and Conquerhttp://blog.csdn.net/com_stu_zhang/article/details/7233761* ---from step2 and step 3,we can find recursive * Step 1://divide into subarray1 and sub array2 * Step 2://MergeSort sub array1 * Step...
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sortRecursive(original, resultList,0, original.size()-1); }/** * 递归排序 *@paramoriginalList 原始列表 *@paramresultList 存放结果的列表 *@paramstartIx 开始 *@paramendIx 结果 *@since0.0.7 */@SuppressWarnings("all")privatevoidsortRecursive(List originalList, ...
Merge Sort is a recursive algorithm, and the following recurrence relation can be used to express its time complexity. T(n)=2T(n/2)+O(n) 2T(n/2)is for the time required to sort the sub-arrays, andO(n)is the time to merge the entire array. The answer to the above recurrence isO...
void merge_sort_recursive(vector<int> &arr, vector<int> ®, int start, int end) { if (start >= end) return; int len = end - start, mid = (len >> 1) + start; int start1 = start, end1 = mid; int start2 = mid + 1, end2 = end; ...