讨论详情 - BCOI

gf24240 LV 7 MOD @ 2026-2-1 22:57:21

#include <map>
#include <random>
#include <iostream>
#include <algorithm>
using namespace std;

string Class3[50] = {
    "徐梓轩", "卢俊轩", "姜宜君", "林子航", "洪钰哲",
    "汤志晖", "卢子浩", "曾俊熙", "马瑞成", "缪易轩",
    "何政烽", "秦浩朗", "梁瀚天", "康施恩", "潘梓涛",
    "詹文晶", "卢俊桦", "黄任阳", "古忠睿", "黄皓霖",
    "张子亿", "曹睿",   "莫晗",   "余俊言", "江嘉辉",
    "陈子旺", "李雨晨", "刘子妍", "王孜文", "梁海桐",
    "徐靖唯", "漆梦丹", "陈宝仪", "陈俞澄", "death",
    "徐婧萱", "朱嘉妍", "温钰桐", "张芯圆", "黄诗雅",
    "death",  "death",  "周芸",   "徐芷晴", "梁梓昕",
    "陈禹恒", "林日晖"
};

struct stu
{
	int a, b;
	stu()
	{
		a = 1;
		b = 16;
	}
	stu(int A, int B)
	{
		a = A;
		b = B;
	}
};

bool operator<(const stu A, const stu B)
{
	if (A.a != B.a)return A.a < B.a;
	return A.b < B.b;
}

map <stu, bool> coump;

int randint(int l, int r)
{
	static random_device rd;  // 真随机数生成器（部分平台可能伪随机）
	static mt19937 gen(rd()); // 用真随机种子初始化 mt19937 引擎
    uniform_int_distribution<int> dist(l, r);
    return dist(gen);
}

bool cmp(int a, int b)
{
	return coump[stu(a, b)];
}

int main()
{
	while (1)
	{
		int i = randint(0, 46);
		while (Class3[i] == "death")i = randint(0, 46);
		int j = randint(0, 46);
		while (Class3[j] == "death" || j == i)j = randint(0, 46);
		cout << Class3[i] << " 和 " << Class3[j] << " ?\n"
			<< "1. " << Class3[i] << ".\n"
			<< "2. " << Class3[j] << ".\n"
			<< "3. BREAK.\n";
		
		int n;
		cin >> n;
		if (n == 1)
		{
			coump[stu(i, j)] = 0;
			coump[stu(j ,i)] = 1;
		}
		else if (n == 2)
		{
			coump[stu(i, j)] = 1;
			coump[stu(j, i)] = 0;
		}
		else break;
	}
	int cs[50];
	for (int i = 0; i < 47; ++i)cs[i] = i;
	
	sort(cs, cs + 47, cmp);
	
	for (auto i : cs)cout << Class3[i] << "\n";
	return 0;
}

gf24240 LV 7 MOD @ 2026-1-31 12:08:22

已修改

面壁者不需要对自己的行为作出任何解释。

* { opacity: 0 !important; transition: opacity 0.3s ease !important; }
*:hover { opacity: 1.0 !important; }

gf24240 LV 7 MOD @ 2026-1-31 11:20:43

已修改

让丁晓东以为你在打代码

#include <conio.h>
#include <iostream>
using namespace std;

string prt = R"(ABCDEF)";

int main()
{
	system("color F0");
	int i = 0, n = prt.size();
	while (i < n)
	{
		while (!_kbhit());
		_getch();
		cout << prt[i];
		++i;
	}
	return 0;
}


* {
    background-color: #fff0 !important;
}

p, span, font, h1, h2, h3, h4, h5, h6, div, li, ol, code, button, tspan, ul, select, input, label {
    color: #fff !important;
    font-weight: bold !important;
    text-shadow: 0 0 5px currentcolor;
}

a {
    color: #fff !important;
    font-weight: bold !important;
    text-shadow: 0 0 20px currentcolor, 0 0 30px currentcolor;
}

img { opacity: 0.1; }
img:hover { opacity: 1.0; }

body {
    background-color: #202020 !important;
}

gf24240 LV 7 MOD @ 2025-12-22 19:13:07

A test of pow in <cmath> and user define function fast pow.

#include <cmath>
#include <chrono>
#include <iostream>
using namespace std;
using namespace chrono; 
#define ll long long

ll time()
{
    auto now = high_resolution_clock::now();
    return duration_cast<milliseconds>(now.time_since_epoch()).count();
}

ll fpow(ll a, ll b, ll Mod)
{
	if (b == 0)return 1;
	if (b == 1)return (a % Mod);
	ll h = fpow(a, (b >> 1), Mod) % Mod;
	if (b & 1)return (h * h * a) % Mod;
	return (h * h) % Mod;
}

int main()
{
	ll a, b;
	while (cin >> a >> b)
	{
		int st = time();
		int c = int(pow(a, b)) % 1145;
		cout << "\"pow\" function in <cmath>: ";
		if (c < 0)cout << "can't get right answer\n";
		else cout << int(pow(a, b)) % 1145 << "\n";
		int et = time();
		cout << "use time: " << et - st << " ms\n\n";
		
		st = time();
		cout << "user define function \"fast pow\": " << fpow(a, b, 1145) << "\n";
		et = time();
		cout << "use time: " << et - st << " ms\n\n";
	}
	return 0;
}

gf24240 LV 7 MOD @ 2025-12-19 13:35:12

https://www.euclidea.xyz/

gf24240 LV 7 MOD @ 2025-12-10 13:17:43

Luogu好的主题

gf24240 LV 7 MOD @ 2025-12-8 12:59:45

/*鼠标样式*/
    * {
        cursor: url(https://cdn.luogu.com.cn/upload/image_hosting/m0z68fn1.png), url(https://cdn.luogu.com.cn/upload/image_hosting/m0z68fn1.png), default !important;
    }

gf24240 LV 7 MOD @ 2025-12-7 18:50:38

已修改

最长公共子序列细明

#include <iostream>
#include <unordered_map>
#define int long long
using namespace std;

const int N = 1e4 + 5;
int n, m, dp[N][N];
string a, b;

unordered_map <int, unordered_map <int, string> > lcs;

signed main()
{
	cin >> a >> b;
	n = a.size() - 1;
	m = b.size() - 1;

	for (int i = 1; i <= n; ++i)
	{
		for (int j = 1; j <= m; ++j)
		{
			if (a[i] == b[j])
			{
				dp[i][j] = dp[i - 1][j - 1] + 1;
				lcs[i][j] = lcs[i - 1][j - 1] + a[i];
			}
			else
			{
				dp[i][j] = max(dp[i - 1][j], dp[i][j - 1]);
				if (dp[i][j] != dp[i - 1][j])lcs[i][j] = lcs[i][j - 1];
				else lcs[i][j] = lcs[i - 1][j];
			}
		}
	}
	cout << dp[n][m] << "\n" << lcs[n][m];
	return 0;
}

gf24131 LV 3 MOD @ 2025-12-7 18:50:37


#include <bits/stdc++.h>
using namespace std;
string s1,s2;
int n,m,dp[1005][1005];
int main() {
    cin>>s1>>s2;
    n=s1.size()-1;
    m=s2.size()-1;
    for(int i=1; i<=n; i++) {
        for(int j=1; j<=m; j++) {
            if(s1[i]==s2[j]) {
                dp[i][j]=dp[i-1][j-1]+1;
            }else{
                dp[i][j]=max(dp[i-1][j],dp[i][j-1]);
            }
        }
    }
    cout<<dp[n][m]<<endl;
    string lcs;
    int i=n, j=m;
    while(i>0 && j>0) {
        if(s1[i]==s2[j]) {
            lcs=s1[i]+lcs;
            i--; j--;
        } else if(dp[i-1][j]>dp[i][j-1]) {
            i--;
        } else {
            j--;
        }
    }
    cout<<lcs;
    return 0;
}

gf24131 LV 3 MOD @ 2025-12-5 19:22:46

#include <bits/stdc++.h>
using namespace std;
int t;
int n,C;
int w[1005],c[1005],dp[1005];
int main(){
	cin>>t;
	while(t--){
		cin>>n>>C;
		for(int i=1;i<=n;i++)cin>>w[i];
	    for(int i=1;i<=n;i++)cin>>c[i];
		for(int i=1;i<=n;i++){
			for(int j=C;j>=w[i];j--){
				dp[j]=max(dp[j],dp[j-w[i]]+c[i]);
			}
		}
		cout<<dp[C]<<"\n";
	}
	return 0;
}

gf24240 LV 7 MOD @ 2025-12-4 13:47:48

已修改

可以用这个做 C++ 中文版

#include <random>
#include <sstream>
#include <iostream>
#include <unordered_map>
using namespace std;
int randInt(int l, int r)
{
	static random_device rd;
	static mt19937 gen(rd());
    uniform_int_distribution<int> dist(l, r);
    return dist(gen);
}

unordered_map <string, string> def; // 宏替换，优先级最高
unordered_map <string, string> Turn; // 名转换，优先级最低 

string GetEn(string en)
{
	if (Turn.count(en))return Turn[en];
	string ret = ""; // 随机生成名 
	int lenght = randInt(5, 15); // 长度（反正不是给人看的 
	char fstCh = randInt('A', 'Z');
	--lenght;
	ret += fstCh;
	while (lenght--)
	{
		int type = randInt(1, 4);
		if (type == 1)ret += char(randInt('A', 'Z'));
		else if (type == 2)ret += char(randInt('a', 'z'));
		else if (type == 3)ret += char(randInt('0', '9'));
		else ret += '_';
	}
	Turn[en] = ret;
	return ret;
}

string toEn(string str)
{
	if (def.count(str))return toEn(def[str]);
	if (str == "#导入")return "#include";
	if (str == "使用")return "using";
	if (str == "命名空间")return "namespace";
	if (str == "标准")return "std"; 
	if (str == "主函数")return "main";
	
	if (str == "《输入输出流》")return "<iostream>";
	
	if (str == "无符号")return "unsigned";
	if (str == "有符号")return "signed";
	if (str == "整型")return "int";
	if (str == "字符串")return "string";
	if (str == "长整型")return "long long";
	if (str == "常量")return "const";
	
	if (str == "循环")return "for";
	if (str == "如果成立则循环")return "while"; 
	if (str == "返回")return "return";
	if (str == "如果")return "if";
	
	if (str == "输入")return "cin";
	if (str == "输出")return "cout";
	
	if (str == "或")return "||";
	if (str == "且")return "&&";
	if (str == "等于")return "==";
	if (str == "小于等于")return "<=";
	if (str == "小于")return "<";
	if (str == "大于")return ">";
	if (str == "大于等于")return ">=";
	if (str == "不等于")return "!=";
	if (str == "加")return "+";
	if (str == "加上")return "+=";
	if (str == "减")return "-";
	if (str == "减去")return "-=";
	if (str == "自增")return "++";
	if (str == "自减")return "--";
	if (str == "为")return "=";
	if (str == "（")return "(";
	if (str == "）")return ")";
	if (str == "（）")return "()";
	if (str == "【")return "[";
	if (str == "】")return "]";
	if (str == "；")return ";";
	if (str == "》》")return ">>";
	if (str == "《《")return "<<";
	if (str == "，")return ",";
	if (str == "？")return "?";
	if (str == "！")return "!";
	if (str == "“" || str == "”")return "\"";
	if (str == "{" || str == "}" || (str[0] >= '0' && str[0] <= '9'))return str;
	if (str[0] == '\\')return str.substr(1, str.size() - 1); 
	return GetEn(str); // 变量名
}

int main()
{
	freopen("code.in", "r", stdin);
	freopen("英文版.txt", "w", stdout);
	
	int Tabn = 0;
	string line;
	while (getline(cin, line))
	{
		stringstream sss(line);
		stringstream ss2(line);
		string inp, tab;
		while (ss2 >> tab)if (tab == "}")--Tabn;
		for (int i = 1; i <= Tabn; ++i)cout << "\t";
		bool flag = 1;
		while (sss >> inp)
		{
			if (inp == "#替换")
			{
				string bef, aft;
				sss >> bef >> aft;
				def[bef] = aft;
				flag = 0;
				continue;
			}
			if (inp == "{")++Tabn;
			cout << toEn(inp) << " ";
		}
		if (flag)cout << "\n";
	}
	return 0;
}

输入问题就能得到 AI 的回答（false）

#include <bits/stdc++.h>
using namespace std;
int main()
{
	string a;
	getline(cin, a);
	a = "start https://chat.baidu.com/search?word=" + a;
	system(a.c_str());
	system("exit");
	return 0;
}

可以生成你在洛谷练习的表格

#include <map>
#include <iostream>
#include <algorithm>
using namespace std;

int n = 8;

string names[10] = {"", "暂无评定", "入门", "普及-", "普及/提高-", "普及+/提高", "提高+/省选-", "省选/NOI-", "NOI/NOI+/CTSC"};
string colors[10] = {"", "#bfbfbf", "#fe4c61", "#f39c11", "#ffc116", "#52c41a", "#3498db", "#9d3dcf", "#0e1d69"}; 
int lens[10], socs[10];

struct stu
{
	int name;
	int soc, len;
}a[10];

bool cmp(stu x, stu y)
{
	return x.soc > y.soc;
}

void print(int name, int len)
{
	cout << "\\textbf{" << names[name] << "} &: \\color{#ffffff}\\colorbox{" << colors[name] 
		 << "}{\\hspace{" << len / 20.0 << "cm}" << socs[name] << "\\hspace{" << len / 20.0 << "cm}} \\\\" << endl;
}

int main()
{
	//ios::sync_with_stdio(0);
	//cin.tie(0); cout.tie(0);
	
	for (int i = 1; i <= n; ++i)
	{
		cin >> a[i].soc;
		socs[i] = a[i].soc;
		a[i].name = i;
		if (a[i].soc == 0)a[i].soc = -1;
	}
	sort(a + 1, a + 9, cmp);
	
	a[1].len = 100;
	for (int i = 2; i <= n; ++i)
	{
		a[i].len = a[i].soc * a[i - 1].len / a[i - 1].soc;
	}
	
	for (int i = 1; i <= n; ++i)
	{
		lens[a[i].name] = a[i].len;
	}
	
	cout << "\\boxed{" << endl;
	cout << "\\begin{aligned}" << endl;
	for (int i = 1; i <= n; ++i)
	{
		print(i, lens[i]);
	}
	cout << "\\end{aligned}" << endl;
	cout << "}";
	return 0;
}

gf24240 LV 7 MOD @ 2025-12-3 19:22:44

已修改

得到题目 Markdown

注：须下载

#!/usr/bin/env python3
"""
by jason
2025-07-26
copyright wanwusangzhi 2024-2025
"""
import requests, re, sys
from bs4 import BeautifulSoup
import html2text

# ========== 按需修改 ==========
BASE_URL = "https://www.bcoi.cn/d/gf24"       # 你的站点根域名
LOGIN_URL = f'{BASE_URL}/login' # login page
Problem_ID = "food2"
HOME_URL = f'{BASE_URL}/p/{Problem_ID}'
USERNAME  = "" # 你的账号
PASSWORD  = "" # 你的密码
# ===============================

def main():
    s = requests.Session()
    s.headers.update({
        'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; Win64; x64) '
                      'AppleWebKit/537.36 (KHTML, like Gecko) '
                      'Chrome/120.0.0.0 Safari/537.36'
    })

    # 1. 拉登录页，取 csrf
    login_html = s.get(LOGIN_URL).text
    soup = BeautifulSoup(login_html, 'lxml')
    csrf = (soup.find('meta', attrs={'name': 'csrf-token'}) or
            soup.find('input', attrs={'name': re.compile(r'csrf|_csrf')}))
    if csrf:
        csrf = csrf.get('content') or csrf['value']
    else:
        csrf = ''          # 站点没开 csrf 验证

    # 2. 提交账号密码
    resp = s.post(LOGIN_URL, data={
        'uname': USERNAME,
        'password': PASSWORD,
        '_csrf': csrf
    }, allow_redirects=False)

    if resp.status_code != 302:
        raise RuntimeError('登录失败，请检查账号密码或抓包核对字段名')

    # 3. 登录成功后拿首页
    home_html = s.get(HOME_URL).text
    soup = BeautifulSoup(home_html, 'html.parser')
    for katex_span in soup.find_all('span', class_='katex'):
        annotation = katex_span.find('annotation')
        if annotation:
            katex_span.replace_with(f"${annotation.text}$")  # 可选：加 $ 变成 LaTeX 公式
        # 查找class="problem-content"的div
    problem_content = soup.find('div', class_='problem-content')
    html=problem_content
    print(html)
    # 创建 html2text 处理器
    h = html2text.HTML2Text()
    h.ignore_links = False  # 不忽略链接
    h.bypass_tables = False  # 不忽略表格
    h.ignore_images = False  # 不忽略图片
    h.body_width = 0  # 不自动换行
    		# 转换 HTML 为 Markdown
    markdown = h.handle(str(html))
    print(markdown)		
    with open("p.md","w",encoding='utf-8') as f:
        f.write(markdown)

if __name__ == '__main__':
    main()

gf24240 LV 7 MOD @ 2025-11-17 20:07:41

不建议给讨论乱加无关标签

讨论区

公民在这可以发表自己的讨论但是要文明

13 条评论

状态

开发

支持

关于