1042 Shuffling Machine

#include<iostream>
#include<map>
#include<string>
using namespace std;
int main() {
    char alpha[5] = { ' ','S','H','C','D' };
    map<int, string> cards;
    for (int i = 1; i < 5; i++) {
        for (int j = 1; j <= 13; j++) {
            cards[(i-1)*13 + j] = alpha[i] + to_string(j);
        }
    }
    cards[53] = "J1";
    cards[54] = "J2";
    int n;
    int a[55], b[55], c[55];
    scanf("%d", &n);
    for (int i = 1; i <= 54; i++) {
        int m;
        scanf("%d", &m);
        a[i] = m;c[i] = i;
    }
    for (int i = 0; i < n; i++) {
        for (int j = 1; j <= 54; j++) {
            b[a[j]] = c[j];
        }
        for (int j = 1; j <= 54; j++) {
            c[j] = b[j];
        }
    }
    for (int i = 1; i <= 54; i++) {
        printf("%s", cards[b[i]].c_str());
        if (i < 54) {
            printf(" ");
        }
    }
    return 0;
}