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We believe that every inhabitant of this universe eventually will find a way to live together in harmony and peace; that trust, patience, kindness and loyalty will exist between every living being of this earth; people will find a way to appreciate and cooperate with each other instead of continuous bickering, arguing and fighting. Harmony — the stage of society so many people dream of and yet it seems so far away from now…
Fortunately, the method of unlocking the key to true Harmony is just discovered by a group of philosophers. It is recorded on a strange meteorite which has just hit the earth. You need to decipher the true meaning behind those seemingly random symbols… More precisely, you are to write a program which will support the following two kinds of operation on an initially empty set S:
It is said that if the answer can be given in the minimum possible time, true Harmony can be achieved by human races. You task is to write a program to help us.
There are multiple test cases in the input file. Each test case starts with one integer T where 1 ≤ T ≤ 40000. The following T lines each describe an operation, either in the form of “B X” or “A Y ” where 1 ≤ X ≤ 500 000, 1 ≤ Y ≤ 1 000 000.
T = 0 indicates the end of input file and should not be processed by your program.
Print the result of each test case in the format as indicated in the sample output. For every line in the form of “A Y”, you should output one number, the requested number, on a new line; output
5 B 1 A 5 B 10 A 5 A 40 2 B 1 A 2 0
Case 1: 1 2 1 Case 2: 1
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