I’ve implemented merge sort in C/C++. But my code takes longer time than the code I pulled from a website. The recursive code seems to be exactly same for both cases: void mergeSort(int* arr, int l, int h) { if (l < h) { int mid = (l + h) / 2; mergeSort(arr,l,mid); mergeSort(arr, mid ..
Category : mergesort
i want to Find the smallest difference in array(not sorted) c++ just nlogn Temporal complexity; just nlong Temporal complexity. i think we need to use merge sort algoritm or change it. sample : In=> [10, 30, 89, 120, 88, 3000, 5] Out => 1 Source: Windows Que..
So, I recently graduated from my university and I am trying to practice coding interviews. Unfortunately, we were taught c++ as c with classes and I never got to use iterators properly. I started from simple sorting algorithms such as the merge-sort and I did it without passing vectors around, only by using operators . ..
I have built functions related to quick sort and merge sort. I am not getting any errors but still I am not getting the required output. #include <iostream> using namespace std; void swap(int *a, int *b); void printarray(int array[], int size); int partition(int array[], int low, int high, int select); void quicksort(int array[], int low, ..
I tried writing a custom version of merge sort in which the sortList function is recursive but the merging function is iterative. I have tried dry running but unable to figure out the problem. This one is a custom testcase which is also resulting in Wrong Answer. Your input: 5 4 3 1 2 6 ..
My program ends without giving any output. It’s not working. Please help me figure what’s wrong and fix the code below. #include <iostream> using namespace std; void Merge(int l[], int sl, int r[], int sr, int arr[], int size) { int i, j, k; i = 0; j = 0; k = 0; while (i ..
I have learned Merge Sort algorithm in C++ recently and have come across 2 different ways by which it is implemented in tutorials. 1st way: void merge(int arr[],int low,int mid,int high){ const int n1=(mid-low+1); const int n2=(high-mid); int*a=new int[n1],*b=new int[n2];//dynamically allocated because of MSVC compiler for(int i=0;i<n1;i++) a[i]=arr[low+i]; for(int i=0;i<n2;i++) b[i]=arr[mid+1+i]; int i=0,j=0,k=low; while(i<n1 && ..
I’m new to coding and have recently been trying to implement a merge sort as part of me getting used to recursion. I had a stab initially on my own and it only seemed to work in weirdly specific cases, which obviously means that I’ve gone wrong somewhere! I have had a peruse of merge ..
My merge sort code is giving some Weird results. that is: 4201675 7257888 7209152 23490 7257888 7257888 6. I am not able to find any bug as it is compiling and giving results by not what i want. it should sort the given array. All possible bugs suggested by vsoce is fixed me. Is there ..
I am currently making a merge sort algorithm but when i run the code i get an error says "terminate called after throwing an instance of ‘std::out_of_range". This is my code. template<typename T> void merge(std::vector<T> &vec, int l, int m, int r){ int i = l; int j = m + 1; int k = ..
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