heap sort python

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Hd1425 sort [heap sorting]

Sort Time Limit: 6000/1000 MS (Java/others) memory limit: 65536/32768 K (Java/Others)Total submission (s): 27771 accepted submission (s): 8400 Problem description gives you n integers. Output The first m in the ascending order. There are two rows of test data in each input group. The first row has two numbers n, m (0 5 33 -35 92 213 -644Sample output 213 92 3 knowledge points: heap, STL#include

Heap sort (Keng Gen)

#include Heap sort (Keng Gen)

Golang-heap-sort

This is a created article in which the information may have evolved or changed. "' Gopackage mainimport (" FMT ") func main () {array2: = []int{3, 2, 1}heapsort (array2) fmt. Println ("Heapmy", Array2)}func heapsort (array []int) {EP: = (len (array)-1) >> 1fmt. Println (EP) for I: = EP; I >= 0; i--{heapt (array, I, Len (array)-1)}for I: = Len (array)-1; i > 0; i--{array[0], array[i] = Array[i], array[0]heapt (array, 0, i-1)}}func heapt (array []int, start int, end int) {le: = start * * + 1re:

On-the-left heap Priority Queue class template Merge sort

) { returnPriorityqueue (N1.merge (N1.getroot (), N2.getroot ()), n1.size () +n2.size ()); } node* Merge (node* N1, node* n2)//whether continue or direction? (minimum leftist heaps) { if(N1 = =NULL)returnN2; if(N2 = =NULL)returnN1; if(N1->data data) {mergeoperate (n1, N2); returnN1;// } Else{mergeoperate (N2, N1); returnN2;//}} node* Mergeoperate (node* N1, node*n2) { if(N1->left = =NULL) {N1->left =N2; returnN1; } Else{N1->right = Merge (n

JavaScript sorting algorithm--heap sort

JavaScript sorting algorithm--heap sort

Heap sort (c + + edition)

#include using namespacestd;voidHeapadjust (intBintStartintN) { intmax=start; intLchild = start*2+1; intRchild = start*2+2; if(Start 1)/2){ if(Lchild A[max]) {Max=Lchild; } if(Rchild A[max]) {Max=Rchild; } if(max!=start) {Swap (A[start], A[max]); Heapadjust (A, max, n); } }}voidBuildheap (intBintN) {//N: [0,n] for(inti = (n1)/2; I >=0; i--) {Heapadjust (A, I, N); }}voidHeapsort (int*a,intN) {buildheap (a,n); for(inti=n;i>=0; i--) {Swap (a[0],a

Heap sort C + + implementation

#include   Heap sort C + + implementation

Heap Sort-algorithms_3th

1#include 2 using namespacestd;3 4 intPARENT (Const inti) {5 return(i>>2)-1;6 }7 8 intLeft (Const inti) {9 return(i1)+1;Ten } One A intRight (Const inti) { - return(i1) +2; - } the - voidMax_heapify (int*ConstAConst inti,Const intheap_size) { - intL =Left (i); - intR =Right (i); + intlargest=i; - if(L A[i]) { +largest =l; A } at Else{ -largest =i; - } - - if(RA[largest]) { -largest =R; in } - if(Largest! =i) { to intKey =A[i]; +A[i]

Three-way quick row, heap sort

than base from the front - $ if(I >= J) Break;//Note that the equals sign $ - swap (Arry[i], arry[j]); - } the -Swap (Arry[lo], arry[j]);//determine the location of JWuyi the returnJ; - } Wu - voidQsort_3way (vectorint> arry,intLointhi) About { $ if(Lo >= hi)return; - - intLt=lo, i=lo+1, gt=Hi; - intPivot =Arry[lo]; A + while(I GT) the { - if(arry[i]pivot) $Swap (arry[lt++], arry[i++]);//i++, should be Lt->pivot, after Exchange lt++, pivot, i+

Quick Sort Algorithm review-bubble sort bubble sort and quick sort (python implementation)

The process of bubbling sorting is to first compare the keywords of the first record with the keywords of the second record, and, in reverse order, Exchange two records and then compare the keywords for the second record and the third record. And so on, until the n-1 record and the nth record's keywords have been compared. The above process is called the first bubbling sort, then the second trip to the previous n-1 the same operation, ...The quick

Python sort-bubble sort, select sort, insert sort

] forIinchRange (len (data_set)):#Big Circle determines the number of rounds that we chooseMinindex =I forJinchRange (I+1,len (data_set)):#a small circle is the number of times we compare each time we choose #//If the subsequent element is smaller than the element I chose, swap the position ifDATA_SET[J] Data_set[minindex]: Minindex=J Temp=Data_set[i] Data_set[i]=Data_set[minindex] Data_set[minindex]=TempPrint(Data_set)" "The basic idea of inserting

A detailed description of how Python implements heap sequencing

The example in this paper describes how Python implements heap ordering. Share to everyone for your reference, as follows: Heap sorting is one of the basic sorting methods, similar to a merge sort rather than an insert sort, which runs at O (Nlogn), like an insert

Sorting algorithm (iv) Python implementation of heap sorting and its algorithm detailed

interchange Total-= 1 if total = = 2 and Array[total] >= Array[total-1]: Break Heap_adjust (Total,1,a Rray) return Arrayprint_tree (sort (total,origin))Five, algorithm analysis1, the use of a heap nature of a selection of sorting, at the top of the heap to select the maximum or minimum value2. Complexity of TimeThe time complexity of

Python Learning Notes (heap usage in python)

Heap: One of the priority queues that use the priority queue to increase the object in any order, and to find (or possibly remove) the smallest element at any time (possibly at the same time as the object is incremented), which is more efficient than the method used for min in the list.Python does not have a separate heap type, only a module that includes some heap

Python implementations of Heap ordering

decremented to ensure that the maximum value is not reordered returnHeapif __name__=='__main__': #A = eval (raw_input (' Please enter a list to be sorted \ n '))A = [Random.randint (1, 2000) forIinchRange (1000)] B=Copy.deepcopy (a) B_begin=Datetime.datetime.now () sort (b) B_end=Datetime.datetime.now ()Print 'My method Use%s'% (B_end-b_begin). Total_seconds () C=Copy.deepcopy (a) C_begin=Datetime.datetime.now () heapq.heapify (c) C_end=Datetim

Sort Algorithm Analysis [5]: Merge and sort (with Python & amp; C ++ code), algorithm analysis python

Sort Algorithm Analysis [5]: Merge and sort (with Python C ++ code), and algorithm analysis with python Merge and sort: combines two sorted sequences into one.Algorithm principle First look at the dynamic diagram: The algorithm is described as follows: Algorithm Implementa

Python implements a two fork heap method

. The number of child nodes of the left and right subtree of the balanced two-fork tree node is the same. In the implementation of the heap, we use the structure of the "complete binary tree" to achieve the approximate "balance". A complete binary tree, which means that each internal node tree reaches its maximum value, except that the last layer can only be missing several nodes on the right. Figure 1 shows a complete binary tree. Figure 1: Complete

How to implement binary heap in Python

= 2 [0, 9, 5, 6, 2, 3]i = 1 [0, 9, 2, 6, 5, 3]i = 0 [0, 2, 3, 6, 5, 9] The following code is a fully binary heap implementation. def insert(self,k): self.heapList.append(k) self.currentSize = self.currentSize + 1 self.percUp(self.currentSize) def percDown(self,i): while (i * 2) You canO(n)It seems incredible that the binary heap can be generated under the overhead, which proves that it is beyond

"Programmer's written interview must be--sort ②" Python implementation count sort, cardinality sort

One, counting sortProfile:  Time complexity O (n), spatial complexity O (k), K is the range of values of the input sequence (maximum-minimum), is stable. The count sort is generally used for a relatively small range of known input values, such as the sorting of height and weight information for company employees.Ideas:   The input array A is {3,5,1,2,4,3}, and the range of values is 5 buckets, and the sequence number is 1,2,3,4,5. When you load a buck

List sort in Python, dictionary sort, dictionary sort in list

#-*-encoding=utf-8-*-import operator #按字典值排序 (default ascending) x = {1:2, 3:4, 4:3, 2:1, 0:0} sorted_x = sorted (X.iteritems () , Key=operator.itemgetter (1)) Print sorted_x #[(0, 0), (2, 1), (1, 2), (4, 3), (3, 4)] #如果要降序排序, you can specify Reverse=true sorte d_x = sorted (X.iteritems (), Key=operator.itemgetter (1), reverse=true) print sorted_x #[(3, 4), (4, 3), (1, 2), (2, 1), ( 0, 0)] #或者直接使用list的reverse方法将sorted_x顺序反转 #sorted_x. Reverse () #取代方法是, with lambda expression sorted_x = sorted (

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