题目:

Excel can sort records according to any column. Now you are supposed to imitate this function.

Input Specification:

Each input file contains one test case. For each case, the first line contains two integers N (≤) and C, where N is the number of records and C is the column that you are supposed to sort the records with. Then N lines follow, each contains a record of a student. A student's record consists of his or her distinct ID (a 6-digit number), name (a string with no more than 8 characters without space), and grade (an integer between 0 and 100, inclusive).

Output Specification:

For each test case, output the sorting result in N lines. That is, if C = 1 then the records must be sorted in increasing order according to ID's; if C = 2 then the records must be sorted in non-decreasing order according to names; and if C = 3 then the records must be sorted in non-decreasing order according to grades. If there are several students who have the same name or grade, they must be sorted according to their ID's in increasing order.

Sample Input 1:

3 1000007 James 85000010 Amy 90000001 Zoe 60

Sample Output 1:

000001 Zoe 60000007 James 85000010 Amy 90

Sample Input 2:

4 2000007 James 85000010 Amy 90000001 Zoe 60000002 James 98

Sample Output 2:

000010 Amy 90000002 James 98000007 James 85000001 Zoe 60

Sample Input 3:

4 3000007 James 85000010 Amy 90000001 Zoe 60000002 James 90

Sample Output 3:

000001 Zoe 60000007 James 85000002 James 90000010 Amy 90

分析:

排序。用cin最后一组数据超时。

代码:

1 #include
     
       2 #include
      
        3 #include
       
         4 #include
        
          5 using namespace std; 6 int n,c; 7 struct Student{ 8     int id; 9     char name[10];10     int score;11 };12 vector
         
           students;13 14 bool compareById(Student a,Student b){15     return a.id
          
           >n>>c;38 for(int i=0;i
           
            >stu.id>>stu.name>>stu.score;42 students.push_back(stu);43 }44 switch(c){45 case 1:sort(students.begin(),students.end(),compareById);break;46 case 2:sort(students.begin(),students.end(),compareByName);break;47 case 3:sort(students.begin(),students.end(),compareByScore);break;48 }49 for(int i=0;i