Mock CCC '14 S3 - Spreadsheet Sorting
View as PDF2014 Mock CCC by Alex and Timothy
Over the years, Alice has collected the physical data of her friend and secret love interest, Bob. Now she's trying to find trends in the data so she can learn more about Bob, and thus get closer to him. Alice entered the data into her spreadsheet software, but learned that unfortunately, the software doesn't work as it should. Namely, the "sort by column" function is broken. Each time Alice clicks a column, she wants all the rows in the spreadsheet to be sorted in nondecreasing order by values from that column. If rows have the same values in the column she clicks, the relative order of these rows should be preserved after the sort. Given the original spreadsheet and the sequence of the columns that Alice clicked, you are to determine the sorted spreadsheet.
Input Specification
Line  of input contains two integers: 
, the number of rows in the
spreadsheet, and 
, the number of columns in the spreadsheet
.
The next  lines will each contain 
 integers between 
 and 
inclusive, representing single cells of the spreadsheet.
The next line of input will have an integer  
, the
number of sort commands that Alice makes.
The last  lines will each contain a number 
 
,
indicating that she sorts by column 
 for the 
-th command
.
Output Specification
The output should contain  lines with 
 integers per line, the
sorted spreadsheet after the 
 clicks.
Sample Input
4 3
6 2 1
9 1 3
9 2 1
6 1 1
2
2
1
Sample Output
6 1 1
6 2 1
9 1 3
9 2 1
Explanation
Alice first sorts by column , then she sorts by column 
. The
spreadsheet is sorted as follows:
Before sorting:    Sort by col 2:     Sort by col 1:
    6 2 1              9 1 3              6 1 1
    9 1 3     ---->    6 1 1     ---->    6 2 1
    9 2 1              6 2 1              9 1 3
    6 1 1              9 2 1              9 2 1
Comments
Can anyone tell me why my code doesn't work at every case?