1028 List Sorting

Problem #

Source: [PAT 1028]

Description #

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(≤105) and C, where N is the number of records andCis 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).

Input 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.

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 1
000007 James 85
000010 Amy 90
000001 Zoe 60

Sample Output 1: #

000001 Zoe 60
000007 James 85
000010 Amy 90

Sample Input 2: #

4 2
000007 James 85
000010 Amy 90
000001 Zoe 60
000002 James 98

Sample Output 2: #

000010 Amy 90
000002 James 98
000007 James 85
000001 Zoe 60

Sample Input 3: #

4 3
000007 James 85
000010 Amy 90
000001 Zoe 60
000002 James 90

Sample Output 3: #

000001 Zoe 60
000007 James 85
000002 James 90
000010 Amy 90

Solution #

解法： 1.读入所有数据 2.根据c调用不同的排序方法 3.打印

Code #