Improve efficiency of PIG Script - apache-pig

Question

DATASET:
I have a data set (data.txt) in (ID, Category) format as given below:
01,X
02,Y
03,X
04,Y
05,X
06,X
07,Z
08,Z
09,X
10,Z
Objective:
The objective is to find out which category has the maximum number of IDs without using UDF.
One Approach:
I have tried multiple times and concluded that this can be achived by the followins set of PIG statements
A1 = LOAD 'data.txt' USING PigStorage(',') AS (ID:int , Category:chararray);
A2 = DISTINCT A1;
A3 = GROUP A2 BY Category;
A4 = FOREACH A3 GENERATE group AS Category, COUNT(A2.ID) AS Number;
A5 = GROUP A4 ALL;
A6 = FOREACH A5 GENERATE MAX(A4.Number);
A7 = FILTER A4 by Number == A6.$0;
A8 = FOREACH A7 GENERATE Category;
DUMP A8;
Request:
Although these statements give the desired result, I am not convinced with its efficiency.
As I am new to PIG, I am not sure if there are any inbuilt functions which can perform such tasks to output the corresponding values of the minimum or maximum value of from a table.
My request is to know if this can be achived in any less number of steps.
Many Thanks

Answer 1

After grouping sort the grouping by counts in descending order and get the topmost record.
A1 = LOAD 'data.txt' USING PigStorage(',') AS (ID:int , Category:chararray);
A2 = DISTINCT A1;
A3 = GROUP A2 BY Category;
A4 = FOREACH A3 GENERATE group AS Category, COUNT(A2.ID) AS Number;
A5 = ORDER A4 BY Number DESC;
A6 = LIMIT A5 1;
DUMP A6.$0;