• 1016. Phone Bills (25)


    分析:

      模拟题,提交无数次WA,注意几点:

      1.如果某人没有有效通话记录,则不输出该人的信息,在此WA15次,题目看了N遍也没出现啊。

      2.通话时间钱的计算:假设我们计算time1到time2的账单;

                (1)我们可以采用从起点(即00:00:00)开始计算,结果就是get_money(time2) - get_money(time1), 这样计算方便。

                (2)我们也可以采用从time1开始递增直到time2, 这样比较烦。

      3.有效的通话记录是指:如果某人的通话记录为1.on;2.on;3.off;,则其中1.on将被抛弃,匹配到2.on;3.off;

      1 #include <iostream>
      2 #include <stdio.h>
      3 #include <algorithm>
      4 #include <cstring>
      5 #include <string>
      6 #include <vector>
      7 #include <cctype>
      8 #include <stack>
      9 #include <map>
     10 
     11 using namespace std;
     12 
     13 int rate_structure[25];
     14 
     15 struct Person
     16 {
     17     string name;
     18     int month;
     19     int dd, hh, mm;
     20     int total;
     21     bool is_on_line;
     22 }person[1005];
     23 
     24 
     25 int cmp(const Person &a, const Person &b)
     26 {
     27     if (a.name != b.name)
     28         return a.name < b.name;
     29     else return a.total < b.total;
     30 }
     31 
     32 double get_money(int idx)                // 得到钱
     33 {
     34     double money = 0;
     35 
     36     money += person[idx].dd * 60 * rate_structure[24];
     37     for (int i = 0; i < person[idx].hh; i++)
     38         money += 60 * rate_structure[i];
     39     money += person[idx].mm * rate_structure[person[idx].hh];
     40 
     41     return money / 100;
     42 }
     43 
     44 bool should_output(int idx, int n)            //判断某人的记录是否有有效记录
     45 {
     46     int pre = -1;
     47     for (int i = idx; i < n; i++)
     48     {
     49         if (person[i].name == person[idx].name)
     50         {
     51             if (person[i].is_on_line == 1)
     52                 pre = i;
     53             else if (person[i].is_on_line == 0)
     54             {
     55                 if (pre != -1) return 1;
     56             }
     57         }
     58         else return 0;
     59     }
     60     return 0;
     61 }
     62 
     63 void work(int n)
     64 {
     65     string tmp = person[0].name;
     66     double sum = 0;
     67     int pre = -1;                        //记录off_line前一个的on_line
     68     bool flag = 0;                        
     69 
     70     if (should_output(0, n))
     71     {
     72         cout << person[0].name;
     73         printf(" %02d
    ", person[0].month);
     74         flag = 1;
     75     }
     76     for (int i = 0; i < n; i++)
     77     {
     78         if (person[i].name != tmp)
     79         {
     80             if (flag == 1)
     81             {
     82                 printf("Total amount: $%.2lf
    ", sum);
     83                 flag = 0;
     84             }
     85 
     86             if (should_output(i, n))
     87             {
     88                 cout << person[i].name;
     89                 printf(" %02d
    ", person[i].month);
     90                 flag = 1;
     91             }
     92             pre = -1;
     93             sum = 0;
     94             tmp = person[i].name;
     95         }
     96 
     97         if (person[i].is_on_line == 1)
     98             pre = i;
     99         else if (person[i].is_on_line == 0)
    100         {
    101             if (pre != -1)
    102             {
    103                 printf("%02d:%02d:%02d ", person[pre].dd, person[pre].hh, person[pre].mm);
    104                 printf("%02d:%02d:%02d ", person[i].dd, person[i].hh, person[i].mm);
    105                 printf("%d ", person[i].total - person[pre].total);
    106 
    107 
    108                 double money = get_money(i) - get_money(pre);
    109                 printf("$%.2lf
    ", money);
    110                 sum += money;
    111                 pre = -1;
    112             }
    113         }
    114     }
    115     if (flag == 1)
    116         printf("Total amount: $%.2lf
    ", sum);
    117 }
    118 
    119 int main()
    120 {
    121     int n;
    122     string status;
    123     while (scanf("%d", &rate_structure[0]) != EOF)
    124     {
    125         rate_structure[24] = rate_structure[0];   //用rate_structure[24]存储0-23之和
    126         for (int i = 1; i < 24; i++)
    127         {
    128             scanf("%d", &rate_structure[i]);
    129             rate_structure[24] += rate_structure[i];
    130         }
    131         scanf("%d", &n);
    132 
    133         for (int i = 0; i < n; i++)
    134         {
    135             cin >> person[i].name;
    136             scanf("%d:%d:%d:%d", &person[i].month, &person[i].dd, 
    137                 &person[i].hh, &person[i].mm);
    138             cin >> status;
    139 
    140             person[i].total = person[i].dd * 1440 + person[i].hh * 60 + person[i].mm;
    141             person[i].is_on_line = (status == "on-line"? 1: 0);
    142         }
    143 
    144         sort(person, person + n, cmp);
    145 
    146         work(n);
    147 
    148         //print();
    149 
    150     }
    151     return 0;
    152 }
    View Code

      

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  • 原文地址:https://www.cnblogs.com/echobfy/p/3545790.html
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