本题是利用counting sort的思想去解题. 注意本题,好像利用直接排序,然后查找rank是会直接被判WA的.奇怪的推断系统. 由于分数值的范围是0到100,很小,而student 号码又很大,故此天然的须要利用counting sort的情况. #include <stdio.h> #include <string.h> const int MAX_N = 101; int arr[MAX_N]; int main() { int Jackson, JackScore, s
Given an unsorted integer array, find the first missing positive integer. For example, Given [1,2,0] return 3, and [3,4,-1,1] return 2. Your algorithm should run in \(O(n)\) time and uses constant space. 若数组为[10,20,30], 则返回0+1 = 1, 因为 A[0]!=( 0 + 1 )
Counting sort is a linear time sorting algorithm. It is used when all the numbers fall in a fixed range. Then it counts the appearances of each number and simply rewrites the original array. For a nice introduction to counting sort, please refer to I
In this challenge you need to print the data that accompanies each integer in a list. In addition, if two strings have the same integers, you need to print the strings in their original order. Hence, your sorting algorithm should be stable, i.e. the
You are given a tree consisting of n vertices. A number is written on each vertex; the number on vertex i is equal to ai . Let's denote the function g(x,y) as the greatest common divisor of the numbers written on the vertices belonging to the simple
You are given a tree consisting of nn vertices. A number is written on each vertex; the number on vertex ii is equal to aiai. Let's denote the function g(x,y)g(x,y) as the greatest common divisor of the numbers written on the vertices belonging to th
public static void countingsort(int[] a, int n) //n = a.length { int max = a[0], min = a[0]; for(int i = 1; i < a.length; i++) { if(a[i] > max) max = a[i]; if(a[i] < min) min = a[i]; } int[] b = new int[max - min + 1]; int[] c = new int[n]; //获取频
计数排序的特点: 需要额外的数组以存储: 中间过程数据(记为数组 C),数组 C 的下标是待排序序列的元素值,下标对应的值为出现的次数: 排序后的序列(记为 B),计数排序仅获取原始待排序序列的值,对原始序列不做 in-place 处理: 计数排序首先统计原始序列各个数(按顺序,也就是索引)出现的次数,需要获取原始序列的最大值,作为计数数组的区间长度: def counting_sort(A, k): # k = max(A) + 1 C = [0]*k for i in A: # 统计 A 中
注意与基数排序区分,这是两个不同的排序 计数排序的过程类似小学选班干部的过程,如某某人10票,作者9票,那某某人是班长,作者是副班长 大体分两部分,第一部分是拉选票和投票,第二部分是根据你的票数入桶 看下具体的过程,一共需要三个数组,分别是待排数组,票箱数组,和桶数组 var unsorted = new int[] { 6, 2, 4, 1, 5, 9 }; //待排数组 var ballot = new int[unsorted.Length]; //票箱数组 var b
Given an array with n objects colored red, white or blue, sort them so that objects of the same color are adjacent, with the colors in the order red, white and blue. Here, we will use the integers 0, 1, and 2 to represent the color red, white, and bl
