ITP1_11_B サイコロ IIをC++で解いてみた[AIZU ONLINE JUDGE]

#include <bits/stdc++.h>
using namespace std;

struct dice {
    int number[6];
};

struct q_table {
    int first;
    int second;
};

int main() {
    random_device rd;
    mt19937 mt(rd());
    uniform_int_distribution<> rand4(0, 3);
   
    dice d;
    int q_count;

    for(int i = 0; i < 6; i++) {
        cin >> d.number[i];
    }
    cin >> q_count;
    q_table q[q_count];
    for(int i = 0; i < q_count; i++) {
        cin >> q[i].first >> q[i].second;
    }

    for(int i = 0; i < q_count; i++) {
        while(true) {
            string instruction = "SNEW";
            int j = rand4(mt);
            int tmp;

            if(instruction[j] == 'S') {
                // S
                tmp = d.number[0];
                d.number[0] = d.number[4];
                d.number[4] = d.number[5];
                d.number[5] = d.number[1];
                d.number[1] = tmp;
            } else if(instruction[j] == 'E') {
                // E
                tmp = d.number[0];
                d.number[0] = d.number[3];
                d.number[3] = d.number[5];
                d.number[5] = d.number[2];
                d.number[2] = tmp;
            } else if(instruction[j] == 'N') {
                // N
                tmp = d.number[0];
                d.number[0] = d.number[1];
                d.number[1] = d.number[5];
                d.number[5] = d.number[4];
                d.number[4] = tmp;
            } else if(instruction[j] == 'W') {
                // W
                tmp = d.number[0];
                d.number[0] = d.number[2];
                d.number[2] = d.number[5];
                d.number[5] = d.number[3];
                d.number[3] = tmp;
            }

            if(d.number[0] == q[i].first && d.number[1] == q[i].second) {
                cout << d.number[2] << endl;
                break;
            }
        }
    }
    return 0;
}