Open梓彦
domjudge搭建
编辑
2025-11-03
运维
00

服务器操作系统：ubuntu22.04（建议和我使用一样的）

先执行sudo apt update 更新

docker 下载（如果没有）

sh
sudo apt install -y docker-compose
sudo mkdir -p /etc/docker
sudo tee /etc/docker/daemon.json <<-'EOF'
{
"registry-mirrors": [
"https://98t8vkfg.mirror.aliyuncs.com",
"https://2a6bf1988cb6428c877f723ec7530dbc.mirror.swr.myhuaweicloud.com",
"https://docker.m.daocloud.io",
"https://hub-mirror.c.163.com",
"https://mirror.baidubce.com",
"https://your_preferred_mirror",
"https://dockerhub.icu",
"https://docker.registry.cyou",
"https://docker-cf.registry.cyou",
"https://dockercf.jsdelivr.fyi",
"https://docker.jsdelivr.fyi",
"https://dockertest.jsdelivr.fyi",
"https://mirror.aliyuncs.com",
"https://dockerproxy.com",
"https://mirror.baidubce.com",
"https://docker.m.daocloud.io",
"https://docker.nju.edu.cn",
"https://docker.mirrors.sjtug.sjtu.edu.cn",
"https://docker.mirrors.ustc.edu.cn",
"https://mirror.iscas.ac.cn",
"https://docker.rainbond.cc",
"https://docker.registry.cyou",
"https://docker-cf.registry.cyou",
"https://dockercf.jsdelivr.fyi",
"https://docker.jsdelivr.fyi",
"https://dockertest.jsdelivr.fyi",
"https://mirror.aliyuncs.com",
"https://dockerproxy.com",
"https://mirror.baidubce.com",
"https://docker.m.daocloud.io",
"https://docker.nju.edu.cn",
"https://docker.mirrors.sjtug.sjtu.edu.cn",
"https://docker.mirrors.ustc.edu.cn",
"https://mirror.iscas.ac.cn",
"https://docker.rainbond.cc"
]
}
EOF
sudo systemctl daemon-reload
sudo systemctl restart docker

在项目启动之前，还需要修改一个配置文件。

sh
sudo vim /etc/default/grub

找到 GRUB_CMDLINE_LINUX_DEFAULT 换成：

GRUB_CMDLINE_LINUX_DEFAULT="quiet splash systemd.unified_cgroup_hierarchy=0 cgroup_enable=memory swapaccount=1"

然后保存，重启

sh
sudo update-grub
sudo reboot

当前在 dom 目录下

database.secret

输入自己的密码

MYSQL_ROOT_PASSWORD=@xxx114514
MYSQL_PASSWORD=xxx114514

judgehost.secret

JUDGEDAEMON_PASSWORD=xxx114514

docker-compose.yml

yml
version: "3.9"

services:
  dj-mariadb:
    container_name: dj-mariadb
    image: mariadb:10.5
    restart: unless-stopped
    ports:
      - "13306:3306"
    volumes:
      - ./database:/var/lib/mysql
    env_file: database.secret
    environment:
      - MYSQL_USER=domjudge
      - MYSQL_DATABASE=domjudge
      - CONTAINER_TIMEZONE=Asia/Shanghai
    command: --max-connections=1024 --max-allowed-packet=1G --innodb-log-file-size=512M
    healthcheck:
      test: ["CMD", "mysqladmin", "ping", "-h", "localhost", "-u", "root", "--password=$$MYSQL_ROOT_PASSWORD"]
      start_period: 30s
      interval: 10s
      timeout: 5s
      retries: 10

  domserver:
    container_name: domserver
    image: domjudge/domserver:8.3.1
    restart: unless-stopped
    ports:
      - "80:80"
    depends_on:
      dj-mariadb:
        condition: service_healthy
    env_file: database.secret
    environment:
      - MYSQL_HOST=dj-mariadb
      - MYSQL_USER=domjudge
      - MYSQL_DATABASE=domjudge
      - CONTAINER_TIMEZONE=Asia/Shanghai
    volumes:
      - ./backups:/opt/domjudge/domserver/backups
    healthcheck:
      test: ["CMD", "curl", "-f", "http://localhost/"]
      interval: 30s
      timeout: 10s
      retries: 3

  judgehost:
    image: domjudge/judgehost:8.3.1
    restart: unless-stopped
    depends_on:
      domserver:
        condition: service_healthy
    privileged: true
    volumes:
      - /sys/fs/cgroup:/sys/fs/cgroup:rw
    env_file: judgehost.secret
    environment:
      - DAEMON_ID=1
      - CONTAINER_TIMEZONE=Asia/Shanghai
    deploy:
      replicas: 5 #评测机数量

启动数据库

bash
docker-compose up -d dj-mariadb

等待数据库完全就绪

bash
# 检查数据库健康状态
until docker-compose exec dj-mariadb mysqladmin ping -u root -p$(grep MYSQL_ROOT_PASSWORD database.secret | cut -d= -f2) --silent; do
  echo "等待数据库启动..."
  sleep 10
done

echo "数据库已就绪！"

启动 DOMServer

bash
docker-compose up -d domserver

数据持久化设置

sh
# 在 dom 目录下执行

# 创建必要的目录
mkdir -p database backups domserver_data/{public/images,public/flags,var}


# 从运行的容器中复制默认数据到宿主机
echo "正在复制 DOMServer 默认数据到宿主机..."

# 复制图片和标志文件
docker cp domserver:/opt/domjudge/domserver/webapp/public/images/. domserver_data/public/images/
docker cp domserver:/opt/domjudge/domserver/webapp/public/flags/. domserver_data/public/flags/

# 复制变量数据
docker cp domserver:/opt/domjudge/domserver/webapp/var/. domserver_data/var/

# 验证数据复制成功
echo "验证复制的数据:"
ls -la domserver_data/public/images/
ls -la domserver_data/public/flags/

echo "数据复制完成！"

修改 docker-compose.yml 添加数据持久化

yml
version: "3.9"

services:
  dj-mariadb:
    container_name: dj-mariadb
    image: mariadb:10.5
    restart: unless-stopped
    ports:
      - "13306:3306"
    volumes:
      - ./database:/var/lib/mysql
    env_file: database.secret
    environment:
      - MYSQL_USER=domjudge
      - MYSQL_DATABASE=domjudge
      - CONTAINER_TIMEZONE=Asia/Shanghai
    command: --max-connections=1024 --max-allowed-packet=1G --innodb-log-file-size=512M
    healthcheck:
      test: ["CMD", "mysqladmin", "ping", "-h", "localhost", "-u", "root", "--password=$$MYSQL_ROOT_PASSWORD"]
      start_period: 30s
      interval: 10s
      timeout: 5s
      retries: 10

  domserver:
    container_name: domserver
    image: domjudge/domserver:8.3.1
    restart: unless-stopped
    ports:
      - "80:80"
    depends_on:
      dj-mariadb:
        condition: service_healthy
    env_file: database.secret
    environment:
      - MYSQL_HOST=dj-mariadb
      - MYSQL_USER=domjudge
      - MYSQL_DATABASE=domjudge
      - CONTAINER_TIMEZONE=Asia/Shanghai
    volumes:
      - ./backups:/opt/domjudge/domserver/backups
      - ./domserver_data/public/images:/opt/domjudge/domserver/webapp/public/images
      - ./domserver_data/public/flags:/opt/domjudge/domserver/webapp/public/flags
      - ./domserver_data/var:/opt/domjudge/domserver/webapp/var 
    healthcheck:
      test: ["CMD", "curl", "-f", "http://localhost/"]
      interval: 30s
      timeout: 10s
      retries: 3

  judgehost:
    image: domjudge/judgehost:8.3.1
    restart: unless-stopped
    depends_on:
      domserver:
        condition: service_healthy
    privileged: true
    volumes:
      - /sys/fs/cgroup:/sys/fs/cgroup:rw
    env_file: judgehost.secret
    environment:
      - DAEMON_ID=1
      - CONTAINER_TIMEZONE=Asia/Shanghai
    deploy:
      replicas: 5

更新 judgehost 密码

bash
# 获取自动生成的 judgehost 密码
echo "JUDGEDAEMON_PASSWORD=$(docker-compose exec domserver cat /opt/domjudge/domserver/etc/restapi.secret | awk 'END{print $4}')" > judgehost.secret

获取管理员admin密码，用于登录web页面

bash

# 获取管理员 admin 密码，用于登录 web 页面
docker exec -it domserver cat /opt/domjudge/domserver/etc/initial_admin_password.secret

# 可选：将管理员密码保存到文件
echo "$(docker exec -it domserver cat /opt/domjudge/domserver/etc/initial_admin_password.secret)" > adm-psd.txt

重启（因为数据挂载更新还没生效）

bash
docker-compose down
docker-compose up -d

然后打开网页登录，账号是 admin

image.png

进入 domserver 容器重置管理员密码 （可选）

bash

echo "password=$(docker exec -it domserver cat /opt/domjudge/domserver/etc/initial_admin_password.secret)" > adm-psd.txt
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乌班图配置root ssh
编辑
2025-11-03
java炒饭
00
sh
sudo apt update
sudo apt install openssh-server
sudo systemctl status ssh
sudo ufw allow ssh
sudo passwd root
vi /etc/ssh/sshd_config
 
#修改如下内容 设置PermitRootLogin  其他的配置默认是不开启root访问的
PermitRootLogin yes
sudo service sshd restart
# or
sudo systemctl restart sshd
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二分图染色
编辑
2025-10-20
XCPC
00

vp了2023济南icpc，卡在一个典题上面（还是太菜了）。

题目链接：https://codeforces.com/gym/104901

直接说结论，给定一个无向图（无重边自环），每条边只能选择两个端点的其中一个，且必须选出一个，很显然对于其中一个连通块的选择方案只有 22 种（第一个点选或者不选一旦确定，后面点的状态是固定的），所以总共的选择方案为 2cnt2^{cnt} ， cntcnt 为连通块的数量，当然前提是每个连通块都是二分图。

回到这个题，（设矩阵为 m×nm\times n ）当第 ii 列和第 n−i+1n-i+1 列 11 的个数超过 33 时无解，为 11 时不需要连边，为 22 时，若在同一行也不需要连，其他情况说明两个 11 在不同的行，设为 x,yx,y ，有两种情况：

1.两个 11 在同一列，说明两者必须一个反转，一个不反转

2.两个 11 在不同列，说明两个必须同时不变，或者同时反转

设 ii 表示反转第 ii 行， i+mi+m 对应不翻转第 ii 行。

第一种情况，连 xx 和 yy 的边。

第二种情况，连 xx 和 y+my+m 的边。

然后做二分图判定即可。

代码：

cpp
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define ll long long
#define endl '\n'
const int M = 2e6 + 5;
const int inf = 2e9, mod = 1e9 + 7;
int a[M], b[M];
int vis[M];
string s[M];
vector<int> f[M];
void add(int x, int y)
{
    f[x].push_back(y);
    f[y].push_back(x);
    // cout<<x<<" "<<y<<endl;
}
int dfs(int x){
    for(auto to : f[x]){
        if(vis[to]){
            if(vis[x] == vis[to])return 0;
            continue;
        }
        vis[to] = 3-vis[x];
        if(!dfs(to))return 0;
    }
    return 1;
}
 void solve()
{
    int m, n;
    cin >> m >> n;
    for (int i = 1; i <= m; i++)
    {
        cin >> s[i];
        s[i] = " " + s[i];
    }
    vector<int> cnt(n + 2);
    vector<vector<int>> g(n + 2);
    for (int i = 1; i <= m; i++)
    {

        for (int j = 1; j <= n; j++)
            if (s[i][j] == '1')
            {
                cnt[j]++;
                g[j].push_back(i);
            }
    }
    for (int i = 1; i <= n; i++)
    {
        if (cnt[i] + cnt[n - i + 1] > 2)
        {
            cout << 0 << endl;
            return;
        }
    }
    for (int i = 1; i <= n / 2; i++)
    {
        if (cnt[i] + cnt[n - i + 1] == 2)
        {
            vector<int> v;
            for (auto x : g[i])
                v.push_back(x);
            for (auto x : g[n - i + 1])
                v.push_back(x);
            int x = v[0], y = v[1];
            if (x == y)
                continue;
            if (cnt[i] == 1)
            {
                add(x, y + m);
            }
            else
                add(x, y);
        }
    }
    for (int i = 1; i <= m; i++)
        add(i, i + m);
    int ans = 1;
    for (int i = 1; i <= 2 * m; i++)
    {
        if (!vis[i])
        {
            vis[i] = 1;
            if (!dfs(i))
                ans = 0;
            else
                ans = ans * 2 % mod;
        }
    }
    for (int i = 1; i <= 2 * m; ++i)
        vis[i] = 0, f[i].clear();
    cout << ans << endl;
}
signed main()
{
    ios::sync_with_stdio(0), cin.tie(0), cout.tie(0);
    int T = 1;
    cin >> T;
    while (T--)
    {
        solve();
    }
}
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linux环境对拍
编辑
2025-09-29
XCPC
00

初始化init.sh

sh

for i in {a..m}
do
  rm -rf $i
  mkdir $i
  touch $i/$i.cpp $i/$i.in $i/$i.out
done

运行run.sh

sh
file=$1/$1.cpp
g++ -o ./temp/main $file 
./temp/main < $1/$1.in > $1/$1.out
cat $1/$1.out

对拍pai.sh

sh
g++ -o ./temp/gen gen.cpp
g++ -o ./temp/std std.cpp
g++ -o ./temp/tle tle.cpp
while true; do
    ./temp/gen > in.txt
    ./temp/tle < in.txt > tleout.txt
    ./temp/std < in.txt > out.txt
    diff tleout.txt out.txt
done
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双指针模板
编辑
2025-09-15
XCPC
00

https://www.luogu.com.cn/problem/UVA11572

cpp
#include<bits/stdc++.h>
using namespace std;
// #define int long long 
const int M=2e5+5;
int a[M];
pair<int,int>f[M];
int dp[M][21];
int lo[M];
void solve(){
    int n;
    cin>>n;
    for(int i=1;i<=n;++i)cin>>a[i];
    map<int,int>cnt;
    int l=1,r=0;
    int ans=0;
    while(l<=n&&r<=n){
        while (r<n)
        {
            if(cnt[a[r+1]]==1)break;
            r++;
            cnt[a[r]]++;
        }
        ans=max(ans,r-l+1);
        // cout<<l<<' '<<r<<endl;
        cnt[a[l]]--;
        l++;
    }
    cout<<ans<<endl;
}
signed main(){
	ios::sync_with_stdio(false),cin.tie(0),cout.tie(0);
    int t=1;
    cin>>t;
    while(t--)solve();
	return 0;
}
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