PAT 甲级 1016. Phone Bills

原题传送门

• 题意：计算话费：先给你24小时每小时内每分钟的资费，分别是00:00-01:00,01:00-02:00的每分钟话费，单位是美分，然后给你n个电话记录，每条记录会有用户名，月：天：时：分，然后是一个状态，online表示打电话，offline表示挂电话。所以我们要排序匹配。而题目中说了保证每个人的记录是一个月份内的。
• 注意：如果记录on-off不能匹配的话就不计算在内。

#include<cstdio>#include<string.h>#include<algorithm>using namespace std;const int maxn = 1010;int toll[25]; // 资费struct Record {    char name[25]; // 姓名    int month, dd, hh, mm; // 月份、日、时、分    bool status; // status==true表示该记录为on-line，否则为off-line}rec[maxn],temp;bool cmp(Record a, Record b) {    int s = strcmp(a.name, b.name);    if (s != 0)return s < 0; // 优先按名字典序从小到大排序    else if (a.month != b.month)return a.month < b.month; // 按月份从小到大排序    else if (a.dd != b.dd)return a.dd < b.dd; // 按日期从小到大排序    else if (a.hh != b.hh)return a.hh < b.hh; // 按小时从小到大排序    else return a.mm < b.mm; // 按分钟从小到大排序}void get_ans(int on, int off, int &time, int &money) {    temp = rec[on];    while (temp.dd < rec[off].dd || temp.hh < rec[off].hh || temp.mm < rec[off].mm) {        time++;//该次记录总时间加一分钟        money += toll[temp.hh]; // 话费增加toll[temp.hh]        temp.mm++;//当前时间加1min        if (temp.mm >= 60) { // 当前分钟数达到60            temp.mm = 0;//进入下一个小时            temp.hh++;        }        if (temp.hh >= 24) { // 当前小时数达到24            temp.hh = 0; // 进入下一天            temp.dd++;        }    }}int main() {    for (int i = 0; i < 24; i++) {        scanf("%d", &toll[i]); // 资费    }    int n;    scanf("%d", &n); // 记录数    char line[10]; // 临时存放on-line或off-line的输入    for (int i = 0; i < n; i++) {        scanf("%s", rec[i].name);        scanf("%d:%d:%d:%d", &rec[i].month, &rec[i].dd, &rec[i].hh, &rec[i].mm);        scanf("%s", line);        if (strcmp(line, "on-line") == 0) {            rec[i].status = true; // 如果是on-line，则令status为true        } else {            rec[i].status = false; // 如果是off-line，则令status为false        }    }    sort(rec, rec + n, cmp); // 排序    int on = 0, off, next; // on和off为配对的两条记录，next为下一个用户    while (on < n) {        int needPrint = 0; // needPrint表示该用户是否需要输出        next = on; // 从当前位置开始寻找下一个用户        while (next < n&&strcmp(rec[next].name, rec[on].name) == 0) {            if (needPrint == 0 && rec[next].status == true) {                needPrint = 1; // 找到on，置needPrint为1            } else if (needPrint == 1 && rec[next].status == false) {                needPrint = 2; // 在on之后如果找到off，置needPrint为2            }            next++; // next自增，直到找到不同名字，即下一个用户        }        if (needPrint < 2) { // 没有找到配对的on-off            on = next;            continue;        }        int AllMoney = 0; // 总共花费的钱        printf("%s %02d\n", rec[on].name, rec[on].month);        while (on < next) { // 寻找该用户的所有配对            while (on < next - 1 && !(rec[on].status == true && rec[on + 1].status == false)) {                on++; // 直到找到连续的on-line和off-line            }            off = on +1; // off必须是on的下一个            if (off == next) { // 已经输出完毕所有配对的on-line和off-line                on = next;                break;            }            printf("%02d:%02d:%02d ", rec[on].dd, rec[on].hh, rec[on].mm);            printf("%02d:%02d:%02d ", rec[off].dd, rec[off].hh, rec[off].mm);            int time = 0, money = 0; // 时间、单次记录花费的钱            get_ans(on, off, time, money);//计算on到off内的时间和金钱            AllMoney += money; // 总金额加上该次记录的钱            printf("%d $%.2f\n", time, money / 100.0);            on = off + 1; // 完成一个配对,从off+1开始找下一对        }        printf("Total amount: $%.2f\n", AllMoney / 100.0);    }    return 0;}

附原题：

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 12.10Totalamount:12.10
  CYLL 01
  01:06:01 01:08:03 122 24.4028:15:4128:16:05243.85
  Total amount: 28.25aaa0102:00:0104:23:594318638.80
  Total amount: $638.80