Problem 2667 --Sort II - Counting Sort

2667: Sort II - Counting Sort

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Time Limit $1$ 秒/Second(s) Memory Limit $512$ 兆字节/Megabyte(s)
提交总数 $9$ 正确数量 $5$
裁判形式 标准裁判/Standard Judge 我的状态 尚未尝试
难度 分类标签 STL

Counting Sort

Counting sort can be used for sorting elements in an array which each of the n input elements is an integer in the range 0 to k. The idea of counting sort is to determine, for each input element x, the number of elements less than x as C[x]. This information can be used to place element x directly into its position in the output array B. This scheme must be modified to handle the situation in which several elements have the same value. Please see the following pseudocode for the detail:

 Counting-Sort(A, B, k) 

1    for i = 0 to k 

2      do C[i] = 0 

3    for j = 1 to length[A] 

4           do C[A[j]] = C[A[j]]+1 

5   /* C[i] now contains the number of elements equal to i */ 

6       for i = 1 to k 7 do C[i] = C[i] + C[i-1] 

8    /* C[i] now contains the number of elements less than or equal to i */ 

9       for j = length[A] downto 1 

10         do B[C[A[j]]] = A[j] 

11             C[A[j]] = C[A[j]]-1 

Write a program which sorts elements of given array ascending order based on the counting sort.

The first line of the input includes an integer n, the number of elements in the sequence.

In the second line, n elements of the sequence are given separated by spaces characters.

Print the sorted sequence. Two contiguous elements of the sequence should be separated by a space character.
7
2 5 1 3 2 3 0

0 1 2 2 3 3 5

1 ≤ n ≤ 2,000,000

0 ≤ A[i] ≤ 10,000

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本题记录 用 户(点击查看用户) 运行号(点击购买题解) 时 间
算法最快[$418 $ms] AOJ大管家 437221 2019-06-08 13:02:24
内存最少[$9708 $KB] 刘成健 333478 2018-11-29 13:02:08
第一AC 刘成健 333476 2018-11-29 12:59:05
第一挑战 刘成健 333476 2018-11-29 12:59:05

赛题来源/所属竞赛 会津大学《挑战数据结构与算法》 挑战数据结构与算法

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