PAT——甲级1042：Shuffling Mashine

终于做到甲级了

就一个感觉。。。。题目是真的看不懂，亏我还是四六级都过了的人。。。。可是看完题愣是一点都不懂是什么意思。

1042 Shuffling Machine （20 point(s)）

Shuffling is a procedure used to randomize a deck of playing cards. Because standard shuffling techniques are seen as weak, and in order to avoid "inside jobs" where employees collaborate with gamblers by performing inadequate shuffles, many casinos employ automatic shuffling machines. Your task is to simulate a shuffling machine.

The machine shuffles a deck of 54 cards according to a given random order and repeats for a given number of times. It is assumed that the initial status of a card deck is in the following order:

S1, S2, ..., S13, 
H1, H2, ..., H13, 
C1, C2, ..., C13, 
D1, D2, ..., D13, 
J1, J2

where "S" stands for "Spade", "H" for "Heart", "C" for "Club", "D" for "Diamond", and "J" for "Joker". A given order is a permutation of distinct integers in [1, 54]. If the number at the $i$-th position is $j$, it means to move the card from position $i$ to position $j$. For example, suppose we only have 5 cards: S3, H5, C1, D13 and J2. Given a shuffling order {4, 2, 5, 3, 1}, the result will be: J2, H5, D13, S3, C1. If we are to repeat the shuffling again, the result will be: C1, H5, S3, J2, D13.

Input Specification:

Each input file contains one test case. For each case, the first line contains a positive integer $K$ ($\le 20$) which is the number of repeat times. Then the next line contains the given order. All the numbers in a line are separated by a space.

Output Specification:

For each test case, print the shuffling results in one line. All the cards are separated by a space, and there must be no extra space at the end of the line.

Sample Input:

2
36 52 37 38 3 39 40 53 54 41 11 12 13 42 43 44 2 4 23 24 25 26 27 6 7 8 48 49 50 51 9 10 14 15 16 5 17 18 19 1 20 21 22 28 29 30 31 32 33 34 35 45 46 47

Sample Output:

S7 C11 C10 C12 S1 H7 H8 H9 D8 D9 S11 S12 S13 D10 D11 D12 S3 S4 S6 S10 H1 H2 C13 D2 D3 D4 H6 H3 D13 J1 J2 C1 C2 C3 C4 D1 S5 H5 H11 H12 C6 C7 C8 C9 S2 S8 S9 H10 D5 D6 D7 H4 H13 C5

Author: CHEN, Yue

Organization: 浙江大学

Time Limit: 400 ms

Memory Limit: 64 MB

Code Size Limit: 16 

 看了汉语翻译之后终于懂得是什么意思了，这道题的意思就是洗牌，将初始牌按照输入的数据洗，第一行输入的是洗的次数，第二行是洗的规则，比如第一个数字36就代表把第一张放到第36的位置。

这道题的重点在于怎么把排号转化为SHCDJ的格式。

我写的代码是

#include<cstdio>

int main()
{
    int k,start[54],option[54],end[54];
    char label[5] = { 'S','H','C','D','J' };
    for (int i = 1;i <= 54;i++) start[i - 1] = i;
    scanf("%d", &k);
    for (int i = 0;i < 54;i++) scanf("%d", &option[i]);
    for (int i = 0; i < k; i++){
        for (int j = 0;j < 54;j++)
        {
            end[option[j]-1] = start[j];
        }
        for (int j = 0;j < 54;j++) start[j] = end[j];
    }
    for (int i = 0;i < 54;i++) {
        printf("%c", label[int((end[i] - 1) / 13)]);
        printf("%d", (end[i]-1)%13+1);
        if (i != 53) printf(" ");
    }
    return 0;
}

另外shuffle就是洗牌的意思。。。。而我不认识

这不就是红方梅黑嘛。。。。而我在读题的时候不认识