PAT 1153 Decode Registration Card of PAT (25 分)- 甲级

A registration card number of PAT consists of 4 parts:

the 1st letter represents the test level, namely, T for the top level, A for advance and B for basic;
the 2nd – 4th digits are the test site number, ranged from 101 to 999;
the 5th – 10th digits give the test date, in the form of yymmdd;
finally the 11th – 13th digits are the testee’s number, ranged from 000 to 999.
Now given a set of registration card numbers and the scores of the card owners, you are supposed to output the various statistics according to the given queries.

Input Specification:
Each input file contains one test case. For each case, the first line gives two positive integers N (≤10
​4
​​ ) and M (≤100), the numbers of cards and the queries, respectively.

Then N lines follow, each gives a card number and the owner’s score (integer in [0,100]), separated by a space.

After the info of testees, there are M lines, each gives a query in the format Type Term, where

Type being 1 means to output all the testees on a given level, in non-increasing order of their scores. The corresponding Term will be the letter which specifies the level;
Type being 2 means to output the total number of testees together with their total scores in a given site. The corresponding Term will then be the site number;
Type being 3 means to output the total number of testees of every site for a given test date. The corresponding Term will then be the date, given in the same format as in the registration card.
Output Specification:
For each query, first print in a line Case #: input, where # is the index of the query case, starting from 1; and input is a copy of the corresponding input query. Then output as requested:

for a type 1 query, the output format is the same as in input, that is, CardNumber Score. If there is a tie of the scores, output in increasing alphabetical order of their card numbers (uniqueness of the card numbers is guaranteed);
for a type 2 query, output in the format Nt Ns where Nt is the total number of testees and Ns is their total score;
for a type 3 query, output in the format Site Nt where Site is the site number and Nt is the total number of testees at Site. The output must be in non-increasing order of Nt’s, or in increasing order of site numbers if there is a tie of Nt.
If the result of a query is empty, simply print NA.

Sample Input:
8 4
B123180908127 99
B102180908003 86
A112180318002 98
T107150310127 62
A107180908108 100
T123180908010 78
B112160918035 88
A107180908021 98
1 A
2 107
3 180908
2 999
Sample Output:
Case 1: 1 A
A107180908108 100
A107180908021 98
A112180318002 98
Case 2: 2 107
3 260
Case 3: 3 180908
107 2
123 2
102 1
Case 4: 2 999
NA

题目大意:给出一组学生的准考证号和成绩,准考证号包含了等级(乙甲顶),考场号,日期,和个人编号信息,并有三种查询方式
查询一:给出考试等级,找出该等级的考生,按照成绩降序,准考证升序排序
查询二:给出考场号,统计该考场的考生数量和总得分
查询三:给出考试日期,查询改日期下所有考场的考试人数,按照人数降序,考场号升序排序
分析:先把所有考生的准考证和分数记录下来~
1、按照等级查询,枚举选取匹配的学生,然后排序即可
2、按照考场查询,枚举选取匹配的学生,然后计数、求和
3、按日期查询每个考场人数,用unordered_map存储,最后排序汇总~

注意:1、第三个用map存储会超时,用unordered_map就不会超时啦~
2、排序传参建议用引用传参,这样更快,虽然有时候不用引用传参也能通过,但还是尽量用,养成好习惯~

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