http://pat.zju.edu.cn/contests/pat-practise/1016

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1016. Phone Bills (25)
时间限制
400 ms
内存限制
32000 kB
代码长度限制
16000 B
判题程序
Standard
作者
CHEN, Yue

A long-distance telephone company charges its customers by the following rules:

Making a long-distance call costs a certain amount per minute, depending on the time of day when the call is made. When a customer starts connecting a long-distance call, the time will be recorded, and so will be the time when the customer hangs up the phone. Every calendar month, a bill is sent to the customer for each minute called (at a rate determined by the time of day). Your job is to prepare the bills for each month, given a set of phone call records.

Input Specification:

Each input file contains one test case. Each case has two parts: the rate structure, and the phone call records.

The rate structure consists of a line with 24 non-negative integers denoting the toll (cents/minute) from 00:00 - 01:00, the toll from 01:00 - 02:00, and so on for each hour in the day.

The next line contains a positive number N (<= 1000), followed by N lines of records. Each phone call record consists of the name of the customer (string of up to 20 characters without space), the time and date (mm:dd:hh:mm), and the word "on-line" or "off-line".

For each test case, all dates will be within a single month. Each "on-line" record is paired with the chronologically next record for the same customer provided it is an "off-line" record. Any "on-line" records that are not paired with an "off-line" record are ignored, as are "off-line" records not paired with an "on-line" record. It is guaranteed that at least one call is well paired in the input. You may assume that no two records for the same customer have the same time. Times are recorded using a 24-hour clock.

Output Specification:

For each test case, you must print a phone bill for each customer.

Bills must be printed in alphabetical order of customers' names. For each customer, first print in a line the name of the customer and the month of the bill in the format shown by the sample. Then for each time period of a call, print in one line the beginning and ending time and date (dd:hh:mm), the lasting time (in minute) and the charge of the call. The calls must be listed in chronological order. Finally, print the total charge for the month in the format shown by the sample.

Sample Input:
10 10 10 10 10 10 20 20 20 15 15 15 15 15 15 15 20 30 20 15 15 10 10 10
10
CYLL 01:01:06:01 on-line
CYLL 01:28:16:05 off-line
CYJJ 01:01:07:00 off-line
CYLL 01:01:08:03 off-line
CYJJ 01:01:05:59 on-line
aaa 01:01:01:03 on-line
aaa 01:02:00:01 on-line
CYLL 01:28:15:41 on-line
aaa 01:05:02:24 on-line
aaa 01:04:23:59 off-line
Sample Output:
CYJJ 01
01:05:59 01:07:00 61 $12.10
Total amount: $12.10
CYLL 01
01:06:01 01:08:03 122 $24.40
28:15:41 28:16:05 24 $3.85
Total amount: $28.25
aaa 01
02:00:01 04:23:59 4318 $638.80
Total amount: $638.80


[cpp]  view plain copy
  1. #include<iostream>  
  2. #include<cstdio>  
  3. #include<memory.h>  
  4. #include<algorithm>  
  5. #include<cstring>  
  6. #include<queue>  
  7. #include<cmath>  
  8. #include<vector>  
  9. #include<cstdlib>  
  10. #include<cmath>  
  11. #include<iomanip>  
  12. #include<string>  
  13. #include<map>  
  14.   
  15. using namespace std;  
  16. struct Node{  
  17.     int mon;  
  18.     int state;  
  19.     int d, h, m;  
  20.     bool operator<(const Node & node)const{  
  21.         if(d!=node.d)  
  22.             return d<node.d;  
  23.         if(h!=node.h)  
  24.             return h<node.h;  
  25.         if(m!=node.m)  
  26.             return m<node.m;  
  27.         return false;  
  28.     }  
  29. };  
  30. struct Record{  
  31.     int mon;  
  32.     int sd, sh, sm;  
  33.     int ed, eh, em;  
  34. };  
  35. struct Res{  
  36.     string name;  
  37.     vector<Record> records;  
  38.     bool operator<(const Res& res)const{  
  39.         return name<res.name;  
  40.     }  
  41. };  
  42. map<string, vector<Node> > rs;  
  43. map<string, vector<Node> >::iterator it;  
  44. map<string, vector<Record> > ans;  
  45. map<string, vector<Record> >::iterator it2;  
  46. int charge[25];  
  47. int chargeByTime(int time)    
  48. {    
  49.     int hours = time/60;    
  50.     int minutes = time%60;    
  51.     int money = 0;    
  52.     int i;    
  53.     for(i = 0;i<hours;i++)    
  54.         money += charge[i%24]*60;    
  55.     money += charge[i%24]*minutes;    
  56.     return money;    
  57. }  
  58. double getcharge(int sd, int sh, int sm, int ed, int eh, int em){  
  59.     return (chargeByTime(ed*24*60+eh*60+em)-chargeByTime(sd*24*60+sh*60+sm))/100.0;  
  60. }  
  61.   
  62. int main(){  
  63.   
  64.     freopen("in.txt""r", stdin);  
  65.     for(int i=0;i<24;++i){  
  66.         scanf("%d", charge+i);  
  67.     }  
  68.     int n;  
  69.     string s;  
  70.     char ss[10];  
  71.     cin>>n;  
  72.     int mon;  
  73.     for(int i=0;i<n;++i){  
  74.         cin>>s;  
  75.         Node node;  
  76.         scanf("%d:%d:%d:%d %s", &mon, &node.d, &node.h, &node.m, ss );  
  77.         if(!strcmp(ss, "on-line"))  
  78.             node.state = 1;  
  79.         else  
  80.             node.state = 2;  
  81.         node.mon = mon;  
  82.         rs[s].push_back(node);  
  83.     }  
  84.   
  85.     it = rs.begin();  
  86.     while(it!=rs.end()){  
  87.         vector<Node> v = it->second;  
  88.         sort(v.begin(), v.end());  
  89.         bool flag = false;  
  90.         Record record;  
  91.         for(int i=0;i<v.size();++i){  
  92.             if(v[i].state==1){  
  93.                 flag = true;  
  94.                 record.sd = v[i].d;  
  95.                 record.sh = v[i].h;  
  96.                 record.sm = v[i].m;  
  97.                 record.mon = v[i].mon;  
  98.             }else{  
  99.                 if(flag){  
  100.                     flag = false;  
  101.                     record.ed = v[i].d;  
  102.                     record.eh = v[i].h;  
  103.                     record.em = v[i].m;  
  104.                     ans[it->first].push_back(record);  
  105.                 }         
  106.             }  
  107.         }  
  108.         it++;  
  109.     }  
  110.       
  111.     it2 = ans.begin();  
  112.     vector<Res> res;  
  113.     while(it2!=ans.end()){  
  114.         Res r;  
  115.         r.name = it2->first;  
  116.         r.records = it2->second;  
  117.         it2++;  
  118.         res.push_back(r);  
  119.     }  
  120.     sort(res.begin(), res.end());  
  121.     for(int i=0;i<res.size();++i){  
  122.         vector<Record> records = res[i].records;  
  123.         cout<<res[i].name<<" "<<setw(2)<<setfill('0')<<records[0].mon<<endl;  
  124.         double ans = 0;  
  125.         for(int i=0;i<records.size();++i){  
  126.             cout<<setw(2)<<setfill('0')<<records[i].sd<<":"<<setw(2)<<setfill('0')<<records[i].sh<<":"<<setw(2)<<setfill('0')<<records[i].sm;  
  127.             cout<<" "<<setw(2)<<setfill('0')<<records[i].ed<<":"<<setw(2)<<setfill('0')<<records[i].eh<<":"<<setw(2)<<setfill('0')<<records[i].em;  
  128.             double c = getcharge(records[i].sd, records[i].sh, records[i].sm, records[i].ed, records[i].eh, records[i].em);  
  129.   
  130.             int time = (records[i].ed-records[i].sd)*24*60 + (records[i].eh-records[i].sh)*60 + records[i].em - records[i].sm;  
  131.             cout<<" "<<time;  
  132.             printf(" $%.2lf\n", c);  
  133.             ans += c;     
  134.         }  
  135.         printf("Total amount: $%.2lf\n", ans);  
  136.     }  
  137.     fclose(stdin);  
  138.     return 0;  
  139. }  
  140.           
──(root㉿xcs)-[/home/xcs/桌面] └─# gpg --show-keys /etc/apt/trusted.gpg.d/kali-archive-keyring.gpg gpg: 目录‘/root/.gnupg’已创建 gpg: 钥匙箱‘/root/.gnupg/pubring.kbx’已创建 pub rsa4096 2025-04-17 [SC] [有效至:2028-04-17] 827C8569F2518CC677FECA1AED65462EC8D5E4C5 uid Kali Linux Archive Automatic Signing Key (2025) <devel@kali.org> ┌──(root㉿xcs)-[/home/xcs/桌面] └─# apt update 错误:1 http://mirrors.aliyun.com/kali kali-rolling InRelease 403 Forbidden [IP: 124.225.96.42 80] 命中:2 http://http.kali.org/kali kali-rolling InRelease 获取:3 http://http.kali.org/kali kali-rolling/main i386 Packages [20.4 MB] 获取:4 http://http.kali.org/kali kali-rolling/main i386 Contents (deb) [47.7 MB] 获取:5 http://http.kali.org/kali kali-rolling/contrib i386 Packages [97.1 kB] 获取:6 http://http.kali.org/kali kali-rolling/contrib i386 Contents (deb) [183 kB] 获取:7 http://http.kali.org/kali kali-rolling/non-free i386 Packages [147 kB] 获取:8 http://mirrors.neusoft.edu.cn/kali kali-rolling/non-free i386 Contents (deb) [859 kB] 错误: 无法下载 http://mirrors.aliyun.com/kali/dists/kali-rolling/InRelease 403 Forbidden [IP: 124.225.96.42 80] 错误: 仓库 “http://mirrors.aliyun.com/kali kali-rolling InRelease” 没有数字签名。 注意: 无法安全地用该源进行更新,所以默认禁用该源。 注意: 参见 apt-secure(8) 手册以了解仓库创建和用户配置方面的细节。 ┌──(root㉿xcs)-[/home/xcs/桌面] └─#
最新发布
07-28
<think>我们有两个主要问题: 1. `apt-key: command not found` 这是因为在较新的Debian/Ubuntu/Kali系统中,`apt-key`命令已被弃用,我们需要使用新的方法管理密钥。 2. 软件源签名验证失败,例如:`The repository 'http://mirrors.aliyun.com/kali kali-rolling InRelease' is not signed` 或者 `NO_PUBKEY ED444FF07D8D0BF6`,这通常是因为缺少对应的GPG密钥。 解决方案分为两部分: 第一部分:解决`apt-key`命令缺失问题并正确添加Kali Linux的GPG密钥。 第二部分:配置正确的软件源并确保密钥被信任。 根据引用[4]中的报错信息,我们知道Kali Linux的密钥ID是`ED444FF07D8D0BF6`。 步骤1:配置国内镜像源(以阿里云为例) 编辑`/etc/apt/sources.list`,替换为以下内容(引用[2]和[3]): deb https://mirrors.aliyun.com/kali kali-rolling main non-free contrib deb-src https://mirrors.aliyun.com/kali kali-rolling main non-free contrib 步骤2:添加GPG密钥(使用新的方法) 由于`apt-key`已被弃用,我们使用以下方法: 方法一:使用gpg和trusted.gpg.d目录(推荐) ```bash # 下载密钥文件并转换为.gpg格式,存放在/etc/apt/trusted.gpg.d/目录下 curl -fsSL https://archive.kali.org/archive-key.asc | sudo gpg --dearmor -o /etc/apt/trusted.gpg.d/kali-archive-keyring.gpg ``` 方法二:如果系统支持,也可以使用以下命令(但可能不如方法一通用): ```bash # 使用wget下载密钥并导入到新位置 wget -q -O - https://archive.kali.org/archive-key.asc | sudo gpg --dearmor -o /usr/share/keyrings/kali-archive-keyring.gpg ``` 步骤3:更新软件包列表 ```bash sudo apt update ``` 如果仍然遇到签名问题,可能是因为密钥没有正确导入或者软件源配置有误。请检查: 1. 确保软件源中的地址与镜像源地址一致(注意是http还是https,以及路径是否正确)。 2. 确保密钥文件被正确放置,并且权限正确(通常为644)。 如果遇到`NO_PUBKEY ED444FF07D8D0BF6`错误,可以尝试手动导入该密钥(使用旧方法,如果系统还支持): ```bash # 如果系统还有apt-key命令(不推荐,但有时临时解决) sudo apt install -y gnupg wget -q -O - https://archive.kali.org/archive-key.asc | sudo apt-key add - ``` 但是,请注意,在Debian 11及更高版本中,`apt-key`命令默认不安装,所以推荐使用新的方法。 另外,引用[1]中提到了同时存在新旧两个源(`mirrors.neusoft.edu.cn`和`old.kali.org`)的情况,这可能会导致冲突。建议只保留一个国内镜像源,避免混合使用。 因此,我们总结完整步骤: 1. 备份当前的源列表: ```bash sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak ``` 2. 编辑源列表,只保留一个国内镜像源(如阿里云): ```bash sudo vim /etc/apt/sources.list ``` 内容替换为: deb https://mirrors.aliyun.com/kali kali-rolling main non-free contrib deb-src https://mirrors.aliyun.com/kali kali-rolling main non-free contrib 3. 下载并导入GPG密钥(使用新方法): ```bash sudo curl -fsSL https://archive.kali.org/archive-key.asc | sudo gpg --dearmor -o /etc/apt/trusted.gpg.d/kali-archive-keyring.gpg ``` 4. 更新软件包列表: ```bash sudo apt update ``` 5. 如果更新成功,则进行升级: ```bash sudo apt upgrade -y ``` 注意:如果使用其他镜像源(如清华大学、浙大),请确保URL正确。例如,清华大学镜像源(引用[3])的配置是: deb https://mirrors.tuna.tsinghua.edu.cn/kali kali-rolling main contrib non-free deb-src https://mirrors.tuna.tsinghua.edu.cn/kali kali-rolling main contrib non-free 最后,如果遇到网络问题(如无法解析域名),请检查网络连接或尝试更换镜像源。 如果按照以上步骤操作后问题仍然存在,请检查系统时间是否正确(使用`date`命令),因为GPG签名验证对系统时间敏感。 生成的相关问题: 1. 如何为Kali Linux配置最佳国内镜像源? 2. Kali Linux更新时出现GPG签名错误如何解决? 3. Debian系Linux如何安全地管理软件仓库密钥?</think>### 解决 Kali Linux 中 `apt-key` 缺失和软件源签名问题 #### 问题分析 1. **`apt-key: command not found`** 在 Kali Linux 2023+ 版本中,`apt-key` 已被弃用,需使用新的密钥管理方式[^4]。 2. **软件源签名错误** 如 `The repository 'http://mirrors.aliyun.com/kali kali-rolling InRelease' is not signed` 表明系统未正确信任软件源签名密钥(Kali 官方密钥 ID: `ED444FF07D8D0BF6`)[^4]。 --- ### 完整解决方案 #### 步骤 1:配置国内镜像源(以阿里云为例) ```bash # 备份原配置 sudo cp /etc/apt/sources.list /etc/apt/sources.list.bak # 编辑源配置 sudo nano /etc/apt/sources.list ``` 删除所有内容,替换为: ```bash # 阿里云镜像源 deb https://mirrors.aliyun.com/kali kali-rolling main non-free contrib deb-src https://mirrors.aliyun.com/kali kali-rolling main non-free contrib ``` > 其他推荐镜像源(二选一): > ```bash > # 清华大学镜像源 > deb https://mirrors.tuna.tsinghua.edu.cn/kali kali-rolling main contrib non-free > deb-src https://mirrors.tuna.tsinghua.edu.cn/kali kali-rolling main contrib non-free > > # 浙江大学镜像源 > deb http://mirrors.zju.edu.cn/kali kali-rolling main contrib non-free > deb-src http://mirrors.zju.edu.cn/kali kali-rolling main contrib non-free > ``` #### 步骤 2:添加 GPG 密钥(新方法) ```bash # 下载并转换密钥格式 curl -fsSL https://archive.kali.org/archive-key.asc | sudo gpg --dearmor -o /etc/apt/trusted.gpg.d/kali-archive-keyring.gpg # 设置正确权限 sudo chmod 644 /etc/apt/trusted.gpg.d/kali-archive-keyring.gpg ``` #### 步骤 3:更新系统 ```bash # 更新软件包列表 sudo apt update # 升级已安装软件 sudo apt upgrade -y # 完整系统升级(可选) sudo apt dist-upgrade -y ``` --- ### 验证修复效果 ```bash # 检查密钥状态 gpg --show-keys /etc/apt/trusted.gpg.d/kali-archive-keyring.gpg ``` 正常输出应包含: ``` pub rsa4096 2012-03-05 [SC] [有效至:2028-01-02] ED444FF07D8D0BF6 uid [ 未知 ] Kali Linux Repository <devel@kali.org> ``` --- ### 常见问题处理 | 问题现象 | 解决方案 | |---------|----------| | `NO_PUBKEY ED444FF07D8D0BF6` | 手动添加密钥:`sudo gpg --keyserver keyserver.ubuntu.com --recv-keys ED444FF07D8D0BF6` | | `Temporary failure resolving 'mirrors.aliyun.com'` | 更换 DNS:`echo "nameserver 8.8.8.8" | sudo tee /etc/resolv.conf` | | 系统时间错误导致验证失败 | 同步时间:`sudo apt install ntpdate && sudo ntpdate pool.ntp.org` | > 注:Kali 官方已明确弃用 `apt-key` 命令[^4],使用新方法可避免未来兼容性问题。操作完成后运行 `sudo apt update` 应不再出现签名错误。
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