#include <iostream>
#include <cstring>
#include <algorithm>
#include <ctime>
#include <unistd.h>
#include <fstream>
#include <vector>

using namespace std;


int main()
{
    ifstream fin("names_output.txt");
    vector<int> ids;
    int id;
    while (fin >> id) ids.push_back(id);

    int n = ids.size();

    srand(time(0));

    puts("获得语法基础课激活码的同学：");
    for (int i = 0; i < 3; i ++ )
    {
        while (true)
        {
            int k = rand() % n;
            if (ids[k] != -1)
            {
                int id = ids[k];
                ids[k] = -1;
                sleep(1);
                printf("user id: %d\n", id);
                break;
            }
        }
    }
    sleep(1);
    puts("----------------------------------------");

    puts("获得算法基础课激活码的同学：");
    for (int i = 0; i < 2; i ++ )
    {
        while (true)
        {
            int k = rand() % n;
            if (ids[k] != -1)
            {
                int id = ids[k];
                ids[k] = -1;
                sleep(1);
                printf("user id: %d\n", id);
                break;
            }
        }
    }
    sleep(1);
    puts("----------------------------------------");

    puts("获得LeetCode究极班激活码的同学：");
    for (int i = 0; i < 2; i ++ )
    {
        while (true)
        {
            int k = rand() % n;
            if (ids[k] != -1)
            {
                int id = ids[k];
                ids[k] = -1;
                sleep(1);
                printf("user id: %d\n", id);
                break;
            }
        }
    }
    sleep(1);
    puts("----------------------------------------");

    puts("获得算法提高课激活码的同学：");
    for (int i = 0; i < 1; i ++ )
    {
        while (true)
        {
            int k = rand() % n;
            if (ids[k] != -1)
            {
                int id = ids[k];
                ids[k] = -1;
                sleep(1);
                printf("user id: %d\n", id);
                break;
            }
        }
    }
    sleep(1);
    puts("----------------------------------------");


    return 0;
}

获奖名单公示：
获得语法基础课激活码的同学：
user id: 30271
user id: 94603
user id: 48879

获得算法基础课激活码的同学：
user id: 106276
user id: 85278

获得LeetCode究极班激活码的同学：
user id: 97709
user id: 60192

获得算法提高课激活码的同学：
user id: 68874